Added push notifications and set flush interval
Updated MixPanel iOS SDK to the latest version
Fixed non-working flush interval
added a default flush interval of 120 seconds (the same as Google Analytics)
Added (working) support for flushInterval, flush() and reset().

- Updated readme
- Updated app.'s to include the setInterval
Added version 0.3 to dist/
Merge pull request #5 from Rebelcorp/master

Add push notifications, flush interval and update the iOS SDK. Closes #2 and #5.