Ant task to run tattletale reports.

This shows dependencies from plugins, which we can use to track
how abstract the core is. (Hah.)

Change-Id: Ia6b8b8abbb9aacd0c2abeddebab6cbb8c4c2464a
Reviewed-on: http://gerrit.dmdirc.com/3407
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager