doc
Merge branch 'master' into body
Merge branch 'master' into body

Conflicts:
	pylayers/mobility/body/body.py
add WORK
modif geomutil
geomutil
Merge branch 'body' of https://github.com/buguen/pylayers into body
mobility in geomutil
fix bug in ex1
Merge branch 'master' into body
show3 body
adding movie method in body
Adding information on installing pyinterval in INSTALL
adding center in body.py
change attributes into parameters in docstring of network
Merge branch 'master' of https://github.com/pylayers/pylayers into body
correction in test suite geomutil
add trajectory method (not finished)
work in body
fixing in body.py