Codacy looks for ruleset.xml, so give it what it wants.
Bump PMD version to the one used by Codacy, for consistency.

This won't affect normal use of the client, other than it having
a few extra unused classes and some additional lines in the
manifest.

Issue #750

Update DMDirc repo to HTTPS.

This allows service entries to be included.

- Stop it thinking "modules" is a valid module.
- Remove some paths that don't exist.
- Apply the auto-suggested gradle tweaks.
- Let it duplicate the VCS config lots, because it's quite insistent.

Change-Id: Ia8eb45562293fa6520e590e2bb1af3df470ce63d
Reviewed-on: http://gerrit.dmdirc.com/3914
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: I3083c2e0ffc75019f752966e5a95dab138c82c3d
Reviewed-on: http://gerrit.dmdirc.com/3898
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Change-Id: Iad5763d7d4baac0b25fafafced0f0483fe8b8329
Reviewed-on: http://gerrit.dmdirc.com/3856
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager