Disable unit tests while we move things around

Constant failing notifications are expected, so we don't need to be
bashed over the head about them.
Remove all references to WP_JSON_Response_Handler.
Merge pull request #548 from WP-API/disable-tests

Disable unit tests while we move things around
Fix copypasta in User docs from Post arguments

offset referenced posts where users is implied.
Merge pull request #550 from JustinSainton/patch-1

Fix copypasta in User docs from Post arguments
Merge branch 'develop' into mock-resource-class