Merge remote-tracking branch 'pylayers/master'

Conflicts:
	pylayers/antprop/signature.py
	pylayers/location/geometric/constraints/cla.py
Merge remote-tracking branch 'pylayers/master'

Conflicts:
	pylayers/antprop/signature.py
	pylayers/location/geometric/constraints/cla.py
ray3d finalized
need to move dev-pyRT computation to Rays
Merge pull request #104 from niamiot/master

Ray3d computation done