Force Tribler package redownload after cleanup
Add BaseManager
ChannelManager is now subclassed from BaseManager (untested, not used anymore)
DownloadManager is now subclassed from BaseManager, plus small cleanup
SettingsManager is now subclassed from BaseManager, plus cleanup
TorrentManager is now subclassed from BaseManager, plus small cleanup
TriblerSession is now a singleton, because subclassed from BaseManager
Fix (unused) ChannelManager
Call TriblerSession as singleton
Small changes to the TriblerSession
Merge pull request #152 from wtud/Tribler-basemanager

Python duplicate/obsolete code cleanup