More tests!
Bid Model is now fully tested
Tests for User validations.
  I cam across a couple of bugs.
  1) while zip is set to "allow_nil: true", the regex is overriding this (same thing with Event#zip). FIX IT!
  2) For some reason "should have_many :messages" is failing due to not having a forign key. FIX IT!
  For the above reasons there is failing code that commented out in this commit. This will be fixed in subsequent commits.