Weight & Missing Tests

- Closes #16 via bb2aa41.

- Issue #16 is half way done. The table that hold relationships between scorecards and indicators now supports a ```weight``` column via SQLAlchemy’s [association proxy](http://docs.sqlalchemy.org/en/rel_0_9/orm/extensions/associationproxy.html).

- Fixed the forms ```scorecards.html```. They are a grid now.