Added public view support (not using controller yet)
Changed Google Account variable from user to id in views and templates (no more confusions with Melange user).
Added templates_helpers for makeSimblingTemplate function.
Addded new template tag readonly_field_as_table_row used in public views
Fixed one typo in roles.py
Moved Proposal model from wiki to source code and updated ProposalModel wiki page.
Patch by: Pawel Solyga
Review by: Todd Larsen
Review issue: 362
Review URL: http://codereviews.googleopensourceprograms.com/362