Fixes for JSON protocol v2

Updates API:
Added seperate response code for invalid user. Wasn't handled correctly before.

Updates iOS & Android:
Handle temporary blocked response
Handle invalid user response

New Strings:
error_auth_account_blocked_temporary_title = Message title displayed to user when the account is temporarily blocked.
error_auth_account_blocked_temporary_message = Message body displayed to user when the account is temporarily blocked.