Adds necessary gems for tests as dependencies
Changes DB init to use Sequel's Migrations

Also adds tasks for schema dump/load for
preparing the database before running tests
Tracks DB schema file
Ignores tags file in versioning
Updates README for new DB generation tasks
Remove test gems from .gems in favor of .gems-test
Updates README file to make the .gems-test file known
Removes original DB bootstrap rake task
Merge pull request #11 from threefunkymonkeys/fix_tests_bootstrap

Fix tests bootstrap