BiteKollektiv/fairnopoly — pull request #23 by mamhoff (2014-07-08 14:36:28+00:00)
Title: Add hearts model and associate libraries

Adds a Hearts model with a "heartable" polymorphic association.
Any model having "heartable" has to include a counter cache for their
and has to "has_many" hearts as "heartable".

This is implemented here for libraries.