This was previously all under checkstyle/ which is weird as there's
a whole bunch of non-checkstyle stuff. Move everything into the nice
etc/ folder to keep it out of the way and sanely organised.

Change-Id: I0df52e8eddc6588c775a5173b624144807f1e59a
Reviewed-on: http://gerrit.dmdirc.com/3102
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: I41c318644eada710c78812260a8397fddd924465
Reviewed-on: http://gerrit.dmdirc.com/1787
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>

Change-Id: I30a88fcd2bab38346dacd02ae9773ffd94ed19c4
Reviewed-on: http://gerrit.dmdirc.com/1786
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>

Change-Id: Ibace6a7b302586afb8c430d80f36341f424f983e
Reviewed-on: http://gerrit.dmdirc.com/1780
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>