Add support for etags to user routes and update specs. Add first pass at etag hash methods to README
Create POST and GET /neighborhoods/:neighborhood/requests route to allow shout out requests
Add support for etags to all key routes (GET /neighborhoods/:neighborhood/items & requests, GET /users/:user/activity & my-requests & neighbor-requests) and update specs, and add version incrementing to models to update etag hash
Merge pull request #20 from mmerkes/conditional_get

Conditional get