nbsz determines the size of the region in reciprocal space considered
to construct the IBZ. Up to now this variable was set to 3 in julia.f.
But this value is not necessarily save. We now calculate a save but
also conservative value for this now local valiable nbszLocal in
brzone2.f90.

Also in this commit: Added build.* to .gitignore.

git version to the executable. This is done by cmake generating a file
init/compileinfo.h with the required data. This file is included in init/compile_descr.F90 and
ignored by git.

This is now included in the eig-file, hence
two new routines in eig66_io have been created.