FormBuilder, Model, FormElement InputHidden improvements

FormBuilder - Now can take multiple id when using arrayIt()
Model - lastUpdate method that will return created_at or updated_at with formating
FormElment - Generation of the id attribute is simpler
InputHidden - has option for no-id when building customily named check_boxes
Migration - no longer allows no primary key (This is a revert of a previous commit.  No time to look into the issue. :( )
Ability to add different ways to join on relationship joins with ActiveRecord::joinWith, FormBuilder bug with relation to dynamic elements
Merge branch 'master' of github.com:mediaslave/phrails