Progress backup - sqlite unit tests passing.
More unit tests passing.
More SQLite tests passing.
Now passing change column tests.
Foreign key implementation working
Added drop column functionality.
Added drop foreign key functionality.
Adding allowance for db file not existing.
Added comment support.
Adding SQLite to environment manager.
Adding env manager test for SQLite.
Merge pull request #146 from mackstar/0.2.x-dev

Added SQLite adapter