Adding rss feed for latest pins.
Finish up feed implementation.
Update to latest requirements including official taggit
Updated requirements to use original repos in many cases and pull
everything from pypi instead of pulling from git repos.
Had to revert tastypie to a previous version due to some issues with
latest.
Update feeds to meet PEP requirements and minor adjustments to base.html
Updated requirements and other items in preps of new pinry version