Started to add LICENSE info to FLEUR

LICENSE

+The MIT License (MIT)
+Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
+to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
+IN THE SOFTWARE.

main/cdngen.f90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
       MODULE m_cdngen
       use m_juDFT
       CONTAINS
@@ -6,16 +11,9 @@
            enpara, cell, noco,jij, results, oneD)
 !
 !     *****************************************************
-!     flapw7 charge density generator
-!                                c.l.fu
-!     correction for nwd>1: semic must be set false for nw=nwd
-!     furthermore ch.d. arrays initialized to zero INSIDE nw
-!     loop; only last window stored; shift do 10
-!     aug 90; r.p.
-!     modifications for slicing by r.p. and h.e. (1/91)
-!     error in reading 66 for spin-polarized case:
-!     read(66) nkpt was read for jspin>1 also
-!     Corrected mai 93 r.p.
+!     Charge density generator
+!         calls cdnval to generate the valence charge and the
+!         core routines for the core contribution
 !     *****************************************************
 !
       USE m_constants, ONLY : pi_const,sfp_const

main/fleur.F90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
       MODULE m_fleur
       IMPLICIT NONE
       CONTAINS

main/fleur_init.F90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
       MODULE m_fleur_init
       IMPLICIT NONE
       CONTAINS

main/fleur_job.F90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
 MODULE m_fleur_jobs
     USE m_juDFT
     IMPLICIT NONE

main/mix.F90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
 MODULE m_mix
   USE m_juDFT
   !*************************************************************************
-  !****  mixing of charge densities:                                    ****
-  !****    IMIX= 0 : linear mixing                                     ****
-  !****    IMIX = 3 : BROYDEN'S FIRST METHOD                            ****
-  !****    IMIX = 5 : BROYDEN'S SECOND METHOD                           ****
-  !****    IMIX = 7 : GENERALIZED ANDERSEN METHOD                       ****
-  !****  implementation to flapw7 ..... R.Pentcheva, D.Vogtenhuber      ****
+  !  mixing of charge densities or potentials:
+  !    IMIX= 0 : linear mixing                                     
+  !    IMIX = 3 : BROYDEN'S FIRST METHOD                            
+  !    IMIX = 5 : BROYDEN'S SECOND METHOD                           
+  !    IMIX = 7 : GENERALIZED ANDERSEN METHOD                       
   !************************************************************************
 CONTAINS
   SUBROUTINE mix(stars,atoms,sphhar,vacuum,input,sym, cell, it, noco, oneD,hybrid)

main/totale.f90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
 MODULE m_totale
 CONTAINS
   SUBROUTINE totale(atoms,sphhar,stars,vacuum, &
        sym,input,noco,cell,oneD, xcpot,hybrid, it,results)
     !
     !     ***************************************************
-    !     subroutine calculates the total energy of the slab
-    !                                  c.l.fu
+    !     subroutine calculates the total energy 
     !     ***************************************************
     !     single particle energies
     !     SEIGC  sum of the eigenvalues of the core states

main/vgen.F90

+!--------------------------------------------------------------------------------
+! Copyright (c) 2016 Peter Grünberg Institut, Forschungszentrum Jülich, Germany
+! This file is part of FLEUR and available as free software under the conditions
+! of the MIT license as expressed in the LICENSE file in more detail.
+!--------------------------------------------------------------------------------
 MODULE m_vgen
   USE m_juDFT
 CONTAINS
   SUBROUTINE vgen(reap,input,xcpot,dimension, atoms,sphhar,stars,&
        vacuum,sym, obsolete,cell,oneD,sliceplot,mpi, results,noco)
     !     ***********************************************************
-    !     FLAPW7 film potential generator                           *
-    !     composed July 1986, revised and tested May 1987           *
-    !     spin-polarized added may 1987                             *
-    !                         c.l.fu,  R. Podloucky                 *
+    !     FLAPW potential generator                           *
     !     ***********************************************************
     !     calculates the density-potential integrals needed for the
     !     total energy
@@ -15,10 +17,6 @@ CONTAINS
     !     TE_VEFF:   charge density-effective potential integral
     !     TE_EXC :   charge density-ex-corr.energy density integral
     !     ***********************************************************
-    !     VR0     average coulomb potential contributes to the Madelung term
-    !     R.Pentcheva 09.05.96
-    !     ***********************************************************
-    !
 #include"cpp_double.h"
     USE m_constants
     USE m_vmts