add exmple config
add error handler in registeration process
use existed user if user has been created
do local project name check before remote check
do application state check before approve/refuse
only check "APPROVED" app when do local check
enable mail support
Merge branch 'use-existed-user-if--has--created' into develop

Conflicts:
	lib/ocp_registry/application_manager.rb
show better view in email
do app existed check before refuse/approve/show
do_reponse adjust for view
hotfix do_response error
start views develop
Merge branch 'develop', finished API development and test
API and Mail service have released, views develop will soon