full python ray tracing done
need some further test to valide
ras
modify loop of evaluation which was wrong
- bug fix ( wrong indexation of interactions)
- add B interactions in Ray.info
Merge remote-tracking branch 'bernard/devel' into interber

Conflicts:
	pylayers/antprop/rays.py
	pylayers/antprop/tests/DEV_PyRT.py
full python CIR
Merge branch 'inter' of https://github.com/niamiot/pylayers into niamiot

Conflicts:
	pylayers/antprop/rays.py