v2 extra endpoints

This commit is for issue #2: https://github.com/cmar/brewerydb/issues/2

This adds the:
* event
* feature
* fluidsize
* guild
* heartbeat
* ingredient
* location
* socialsite

endpoinds.  There are other endpoints to add, but they do not have GET requests on them, only destructive RESTful verbs.... one day :+1: