Port english version of admin features page for REST.
Port english version of configuring your application page for REST.
Port english version of configuring push notification page for REST.
Port english version of checking your application page for REST.
Fix link.
Port english version of changing user password page for REST.
Port english version of disabling users page for REST.
Merge pull request #65 from shinsuke-nara/admin

Port english version of admin features section for REST