changes sqlite over to postgresql

All databases in the project now use postgresql instead of sqlite.

Two migration modifications were required (let me tell you about them):

1.  20130815081621_remove_disabled_from_user.rb was removed as there seemed to be no "disabled" column anymore.  I think this was a side effect of the devise change you made earlier.
2. 20130905032310_months_should_be_integers.rb postgresql does not like it when you try to change column types without using the syntax specified in the migration below (raw sql basically).

Hopefully all these changes are cool :+1: