Released v2.1

New features:
Lance: Added a SIGUSR1 signal that will print the actual configuration to the log (ex: killall -SIGUSR1 lance.py)
Lance & Lance manager code partially rewritten in order to share some class together

Bugfixes:
Lance: A bug that lead lance to crash when a program try to start with an unexisting user has been corrected. It will now result in an error in the log and also a "Fail" status in the webgui / lc.py --status