add json patch update method and specs for users_controller update action
conform to JSON PATCH request headers and body content.
Install rolify and pundit
Add visibility concern
Add visiblity examples to project
Add owned object policy spec
Add application policy spec
Add specs for user group policy and user policy
Fix problem with spec order
Add visibilty concern to collections
Set policy class for ownable objects
Add scoped access and policy checks to user controller
Add specs testing unauthorized access
Add basic authorization for projects controller
Add jruby configuration for jruby build
Fix incorrect spec
Add note about JRuby 2.0 compatibility mode