Introduce a DcopExecutor, deprecated static junk.

Change-Id: I2ab961afd0475693662604356b7946f8f12d2478
Reviewed-on: http://gerrit.dmdirc.com/3647
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Unused field.

Change-Id: I801bef0d0a7c00c47978c024e118e28100bbb654
Reviewed-on: http://gerrit.dmdirc.com/3648
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager