added count utility method for the Keyword model, put some of my notes on the database schema into a more formal doc called Information Architecture - perhaps misnamed.
added count utility method for the Keyword model, put some of my notes on the database schema into a more formal doc called Information Architecture - perhaps misnamed.

hacktahoe/tahoe_answers,hacktahoe/tahoe_answers,hacktahoe/tahoe_answers,hacktahoe/tahoe_answers,hacktahoe/tahoe_answers,hacktahoe/tahoe_answers,hacktahoe/tahoe_answers