make poet_snap, and poet_unsnap routes mapping them to poet#snap and poet#unsnap
make stubbed out snap and unsnap actions in poet controller
make snap model validate for presence of poet_id and poem_id
finish poet#snap and spec
make poet#unsnap and spec
Merge pull request #8 from anirudh-eka/make_poet_controller_snap_api

Make poet controller snap api