First cut integrating gradle for use in Android Studio

TODO: Remove lint ignores and uncomment 2 subprojects from settings.gradle
Create Readme.md index by week

Potentially solves github issue #2
Merge pull request #6 from DavidJFelix/patch-2

Create Readme.md index by week
clean up project files
clean up
Lint 0.8.1 fixed some issues(http://code.google.com/p/android/issues/detail?id=40005), removing TODO and cleaning up the code

Moving HelloAndroidTest to HelloAndroid, tests are successful

Removing deprecation from the testcase

Adding gradle files to some projects which didn't have a build.gradle file
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/bond-/coursera-android