FrameContainers now expose Connections.

Change-Id: Id55c3611173be7ed79fae8f9e976996d713b8646
Depends-On: I02a54b0bcfaef08d5757cc015c356f9779ec0371
Reviewed-on: http://gerrit.dmdirc.com/2949
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>