Also includes a refactoring of creating and dumping tables and using the environment variable for mysql user in testing shards config.
MetricFu depends on Rcov which is not compiling on 1.9.3 (which is arguably the Future(tm)).
Rails 3.2 changes inheritable_attributes to just attribute and this will work across both versions. This adds a few extensions that Octopus isn't using but nothing that ActiveRecord probably doesn't bring in on it's own.
If you want to test against all versions, run `rake appraisal spec`