Initial work on making IDEA run DMDirc.

This adds a DMDirc run configuration, which will generate a
version.config in the right place.

This is enough to get a client working, but probably isn't
builiding new plugins yet.

Change-Id: I4a2c20ea23164c7f71200e9b767d5dc3507945a7
Reviewed-on: http://gerrit.dmdirc.com/3848
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>