Use Rake's TaskLib to generate tasks

Ignore the lib/tasks directory, as it's no longer needed.
Add SQLite3 for testing
Beef up the test_project to make the tests pass
Forgot to include Rake in the main Enrar file.
Add db:create task
Move DB creation rake task test to unit test
Enrar::Migrator is delegates to ActiveRecord::Migrator
Migrations are camelized, NOT contstantized.

Remove the sample migration fixture in favor of named fixtures
Properly named migration files for migrator_test.
Refactor an if statement in Enrar.root