Added support for gradle

Gradle support added
Facebook sdk version 4.0.0 with some modifications

fixed bug while no internet connection

Merge pull request #17 from hashcube/fix-for-no-connection-bug

added handling error when there is no network

Minor bug fix with AppEvents for iOS

Fixes issues with AppEvents for iOS

v3.3.7
Added support for logging appevents to facebook

Support for logging Events to facebook

Support for logging any of the 14 default events or any custom event to facebook
App Launch Event is automatically triggered. Other events have to be triggered manually

fb support libs upgrade

Upgraded jar files:

• android-support-v4
• android-support-annotations

Facebook API calls are not in UI Thread

Fix bug where API calls were being done in the UI Thread. Will resolve any ANRs