Moved Proposal model from wiki to source code and updated ProposalModel wiki page.
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

--HG--
extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%40431

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son