Deal with core class renaming.

Change-Id: I4f234d73a88d53ccd0e695c39d319fbdc06eba95
Depends-On: I0f0211edba8e8c19857d0a783f23b90aee89e84c
Reviewed-on: http://gerrit.dmdirc.com/3750
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager