commiting before checking out
Trying to optimize layers
optimizing
Merge branch 'dev' of https://github.com/rmari/LF_DEM_viewer into dev

Conflicts:
	src/draw.py
	src/omerFile.py
Adding possibility to give a prefactor number to some functions
 bug fixing on key combination handling
Renaming Homer, cleaning code
halfway through optimization
Refactoring the internals of frame class, in order to reduce the memory footprint
trying to reduce memory footprint, not very successful
cleaning