Updating plugin to 0.9.00. Adding turn-based and real-time multiplayer; bug fixes.

New features:
    * Turn-based multiplayer (iOS, Android)
    * Real-time multiplayer (iOS, Android)
Bug fixes:
    * #49 - double cancellation necessary
    * #40 - add account crashes app
    * #25 - Action Scheduled for Later
    * properly close Achievement buffer
    * fix memory management on iOS
    * minor fixes