nothing
nothing
work on antennas
Merge remote-tracking branch 'pylayers/master'

Conflicts:
	doc/notebooks/VSH.ipynb
	pylayers/antprop/antenna.py
	pylayers/antprop/spharm.py
modif of channel.py
ras
Merge branch 'master' of https://github.com/pylayers/pylayers
add a pol3D function in new module util/plotutil
Merge pull request #108 from mmhedhbi/master

Add function pol3d in new moduel util/plotutil
handling of frequency
Merge branch 'master' of https://github.com/pylayers/pylayers
simplifying plotVW
not working rays
Merge branch 'master' into devel