MOD:fix duplicate create circles in iadd interface
ADD: add Message model, MessagesController, and new interfaces for message
operation
MOD: add push msg interface
ADD:add chat model and chats controller, and circle chat related
interfaces
MOD:support more content types in messages
MOD:update push client to support more complete message content
MOD:seperate valid users and register users, nomalize error code, add
iafterLogin, ibeforeLogout interface for users controller
MOD:complete users controller, add sms invitation support in people
controller
MOD:code review, normalize interface function for response and err, and
extract some private function for common use
ADD: first commit for wap branch
Merge branch 'wap' of github.com:nnjme/reindeer_server into wap

Conflicts:
	Controller/CirclesController.php
	Controller/GrowthController.php
	Controller/UsersController.php
	Vendor/Utility.php