Remove sidekiq-spy mailing list from build notifications.

This doesn't work, as Travis CI can't confirm the mailing list
subscription. But perhaps it's best not to flood the mailing list with
build notifications, anyway. If you'd like to be notified of builds,
however, please add your address and send a pull request. :)
Tweak build list, sorting order.
Revert "Configure https://coveralls.io, installing coveralls ."

This reverts commit f5af9fa47b143effd75ed16a857ff057c77e3508.

Conflicts:
	README.md
Fix test Spy::Stats undefined Minitest.

It's `MiniTest`. Ruby 2.0.0 allows `Minitest` which returns `MiniTest`;
Ruby 1.9.3 does not.
Allow class overrides in Spy::Stats#initialize .

This allows for external instances to be used instead of creating new
ones. It also makes testing easier.
Change Spy::Stats test to not use stubs on classes.

Although using stubs on classes works in Ruby 2.0.0, Ruby 1.9.3 errors
with it not being defined. Utilise the class overrides available in
`Spy::Stats`, and override selected Redis methods by mixing in modules
within tests.
Revert "Allow build failures for Ruby 1.9.3 ."

This reverts commit c2aedf13ed46282411a1d44ad8a944acae1c725e.
Merge branch 'ruby-1.9.3-fixes' into develop
Document branch structure and release method.
Install Mocha, for mocking and stubbing.

Decided overriding class instantiation manually will likely yield to
unnecessary pain. ;) Let's install Mocha and keep things clean(er).
Revert "Allow class overrides in Spy::Stats#initialize ."

This reverts commit c1eb1b3c4d2134c58fc7d2be9cb69d61207f8565.
Fix Spy::Stats tests, switching to use Mocha stubs.
Merge branch 'mocha' into develop
Move App.config tests to App tests from Config tests.

This is probably a better home for them, and enables the Config tests'
dependency on `lib/sidekiq-spy/app.rb` to be removed.
Add App tests, adjusting App slightly.

Don't draw on screen during `App` tests. Test Sidekiq configuration
called. Test `App` hooks called, using `run_and_kill` helper.
Add Translatable tests.
Rework App #run_and_kill tests as #start_and_stop_app .

The `#run_and_kill` implementation failed intermittently. Rework as
`#start_and_stop_app`, explicitly stopping `App` and waiting a little
for it to end. Also fix typo in App tests description.
Add Display::Subpanel tests, tweaking Display::Subpanel.

Test main functionality of `Display::Subpanel`, including positioning
and data using strings and lambdas. Tweak `Display::Subpanel`, adding
`@data` empty-string defaults and simplifying slightly.
Fix App tests intermittent #start_and_stop_app failures.

Sleep to allow `App` time to start. Also rename to `app_thread` for
consistency.