Added null checks in XMPRPC tasks in XMLRPCChannelManager to make the code run without a connection to tribler
Added null checks in XMPRPC tasks in XMLRPCTorrentManager to make the code run without a connection to tribler
Added null check on menu in ThumbGridFragment.onPause
Merge pull request #29 from wtud/jenkinsFix

Emma is broken (see Jenkins)