Added respondence to *_before_type_cast for all attributes to return their string-state before they were type casted by the column type. Added use of *_before_type_cast for all input and text fields.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@215 5ecf4fe2-1ee6-0310-87b1-e25e094e27de