Rev some gemfiles
Tear down test
Revamp test suite

Mostly this involves upgrade to the latest mysql_isolated_server, which
is much much much better at playing nice with test/autorun; so we don't
have to have the hacks we had before.

Now we se MiniTest::Unit instead of Test::Unit

Rails 4.0 requires an older version of MiniTest. In that case, we have
to alias the Test class.
better wait for replication sync
Test against Rails 4.1 and 4.2
Merge pull request #13 from bquorning/more-rails-compatibility

Test compatibility with Rails 4.1 and 4.2