Fix the dependency-switheroo script.

Excluding 'com.dmdirc:util' nuked the project as well. That wasn't
good. Instead, just call remove on the DependencySet. That seems
to work and is a lot simpler.
Merge pull request #9 from csmith/fix-dependencies

Fix the dependency-switheroo script.
Add clover support.

`./gradlew clean cloverAggregateReport` in meta will create a new
report for all the projects with tests.

Plugins that don't have any tests won't show up at all.
Merge pull request #10 from csmith/clover

Add clover support.
Change submodules to HTTPS urls.

Update the HEAD positions.