Added a fitting icon

PYRAMID: PYthon based Reconstruction Algorith for MagnetIc Distributions
Separated Igor files from PYRAMID files
moved all files one folder higher

Holoimaging and phasemap now have separate display functions
Display_combine implemented in main.py
Changed sqrt(x^2 + y^2) to np.hypot(x,y)
magcreator now uses <= instead of <
pdb starts on error (implemented in main.py)

Changed the way parameters are given to magcreator functions (now as tuples)
Implemented the real space approach to get phase images (works, but slow!)