Add a clean_agrees_to_tos() validator that requires "Yes" if ToS exists.
Add a clean_agrees_to_tos() validator that requires "Yes" if ToS exists.

Also, more user_logic.logic => user_logic fixes.  If you are going to import
"as", you might as well make the renaming worthwhile.  Maybe we need to add
a section on "import ... from ... as ..." in the style guide?

Patch by: Todd Larsen
Review by: to-be-reviewed

--HG--
extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%401448

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