Add creates a new resource.

CloseResponse closes a response body; If you use DoRequest, and not one of the higher level helpers like Get or Post, you should use `defer CloseResponse(response)` to ensure it gets cleaned up properly.

DeleteByID will delete a resource with the provided id.

GetAll returns all resources.

GetByID returns the resource that matches the input ID.

GetByQuery returns a collection of resources based on the criteria defined by its input query parameter.

Update modifies a resource based on the one provided as input.

HttpSession is a layer over http.Client, and provides the following additional functionality: - Holding a 'base' URL, and using it to qualify relative URL's - Holding default HTTP request headers, and propagating them onto - Converting payloads to/from JSON, including our behaviour of converting HTTP 4xx/5xx responses into go error structs - Helpers for convenient Get/Put/Post/etc - Dealing with quirks of the go io subsystem (flushing buffers where required etc).