Add a getForFields method
Add a getForFields method

It allows for generic queries with restrictions specified
in a dictionary.

--HG--
extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%40973

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