Acting as a User

Now bedwetter knows how to act as a user. Added options, tests and documentation. Still wanting more test coverage.

Settle on HTTP verbs and responses.

Here I've adjusted the HTTP verbs away from those used in sailsjs's blueprints hook. I actually used GitHub's API v3 as a reference point. I've also adjusted the behavior of the populate bedwetter to return an array of associated records in the case of /model/1/association-type routes and return a simple 204 or 404 to verify an association in the case of /model/1/association/8-type routes. We also have better tests written, but need higher code coverage overall.

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Main changes:

• add is split up into PUT for simple association creation and POST for record creation followed by association creation.
• update can use POST or PATCH
• populate returns an array of associated records rather than that array populated on a parent record for /model/1/association-type routes. populate returns a simple 204 or 404 response for /model/1/association/8-type routes to check if a relation exists between records. "Populate" may be a misnomer now.
• Better tests for all of this.