- Return pagination headers for all endpoints that return an array
- Removed `DELETE projects/:id/deploy_keys/:key_id/disable`. Use `DELETE projects/:id/deploy_keys/:key_id` instead
- Moved `PUT /users/:id/(block|unblock)` to `POST /users/:id/(block|unblock)`
- Make subscription API more RESTful. Use `post ":id/#{type}/:subscribable_id/subscribe"` to subscribe and `post ":id/#{type}/:subscribable_id/unsubscribe"` to unsubscribe from a resource.
- Make subscription API more RESTful. Use `post ":project_id/:subscribable_type/:subscribable_id/subscribe"` to subscribe and `post ":project_id/:subscribable_type/:subscribable_id/unsubscribe"` to unsubscribe from a resource.
- Labels filter on `projects/:id/issues` and `/issues` now matches only issues containing all labels (i.e.: Logical AND, not OR)