Facebook Android SDK 3.0.2 (see https://developers.facebook.com/android/change-log-3.x)

Summary:
    - Updating project structure to work with ADT v22.

Test Plan: Release testing

Reviewers: clang

Reviewed By: clang

CC: platform-diffs@lists

Differential Revision: https://phabricator.fb.com/D874918
update android-support-v4.jar to rev 18
Merge remote-tracking branch 'facebook/master' into HEAD

Conflicts:
	facebook/.classpath
Merge pull request #4 from mhama/master

updated support library to v18, merged facebook/master