Added some minor comments after discussions with Ron. Focused in
part on legacy code we don't need anymore.
Added TODO's for some of the comments
Merge pull request #233 from subutai/minor_clamodel_comments

Added some minor comments after discussions with Ron. Focused in part on legacy code we don't need anymore. This is to prepare for a later cleanup phase.
Merge branch 'master' of github.com:numenta/nupic into spswitch