Change submodules to HTTPS urls.

Update the HEAD positions.

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.

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.

Add a script to magically change dependencies.

This changes any com.dmdirc.* dependency references into
local project references.

It doesn't yet work for the parser as that's a different
group, and doesn't have independent projects.

Include submodules in gradle.

Start work on a README.

Unignore the submodules.

That didn't work :)

Update Gerrit commit hook.

This reverts commit 7ec738a776.

Add task to install gerrit commit-msg hook.

Add gradle wrapper.

Add other repos as submodules.

I've added them to .gitmodules but ignored the repos themselves.
Hopefully this means everyone can just do `git submodule update
--init --remote`, without us having to commit updates every
time one of the repos changes.