Removed commit().
Removed columns in Peer table.
Small fix.
Cleaned up Peer table.
Small fix.
Dropped the Friend VIEW.
Small fix + update unit tests.
Merge pull request #338 from LipuFei/db-cleanup

DB Cleanup
Removing some obsolete tools
Introduced tribler_main.py, this is a copy of the old tribler.py without
the logging.config.
If tribler is to be used as a library, import run from tribler_main.py
instead of tribler.py
Small fixes for channelcast-supporter and metatdata-injector
No more if for channelcast-supporter
Merge branch 'remove_tools' of ssh://github.com/NielsZeilemaker/tribler into remove_tools