Prevent session.py to be included in distribution for now

darcs-hash:20090210173404-58103-42a683bb3c7d990b6319ed0328b9a6caf935113d
Renamed debian share folder to sipsimple

darcs-hash:20090210175151-58252-64043ce3b299df4787f5386b112f4aba639c0d7a