Merge remote-tracking branch 'bernard/master'
nothing
nothing
Modification in test_tud.py
autopep8 algebraic.py
modification in rays.py
adding new test-file in antprop
fix bugs in buildGi of layout
work on converting signature into rays
add a new version of signature class
some changes to be ignored
moving function signature from layout.py to signature.py and ranaming it get_sigarr
Merge branch 'devel' of https://github.com/niamiot/pylayers into niamiot-devel

Conflicts:
	pylayers/antprop/rays.py
	pylayers/antprop/tests/test_tud.py
adding sig2ray function to signature.py to compute ray from signature
nothing
fixing a bug in image() in signature.py
update signaure.py to include diffractions
Merge pull request #61 from mlaaraie/master

Update layout.py and signature.py
Fixing bug in mobility directory
Merge branch 'master' of https://github.com/buguen/pylayers
work on VSH