Add the ability to store riak_test's locally.

Add compile dependencies, upgraded rebar, and additional plugins to
allow riak_test's to be placed inside of the floppystore repository.
Use make to recompile, and test using the following addition to your
riak_test configuration:

Ex: {test_paths, ["/Users/cmeiklejohn/SyncFree/floppystore/riak_test/ebin"]}

Closes #30.