Made more restfull

Added CORS headers on `OPTIONS`
Removed `links` population
Fixed post to use singular model name to pull record out.
added allowOrigin option
Setting default allow origin to none
Fixes #13, unknown model routes return node error

Adds new error message and handling for /:resource and /:resource/:id routes when requested resource is not a known model
Basic PUT support, addresses #6

need to test against relationship updates
Merge branch 'restfull'
added support for multiple transport formats
switch to storing data in `req.locals`