Merge pull request #6 from mayfield/master

Include pypi required files in MANIFEST.in
Update version/docs to 0.14
Update __init__.py

bug fix : Json._from_redis(). If you call 'save()' more than twice you can't load Json type on any objects drived from Model object.
Merge pull request #7 from MickeyKim/patch-1

Update __init__.py, fix saving of json columns multiple times.
Fix from https://github.com/MickeyKim to fix Json columns
Added Boolean, DateTime, Date, and Time columns
Added LGPL 3 license option.
Fix for .delete()ed objects being resurrected by session.commit()
Bumped version number
Fix for a bug with unique indexes

* Fixes https://github.com/josiahcarlson/rom/issues/10
Added lua writes and entity refreshing
Fix for the docs to include the columns module
Fix for missing module issue
Perf improvements and datetime attribute update fix
Improved performance for single-filter queries