Fixed bug in ApigeeDataClient method queryUsersForGroupAsync.
Initial commit for adding code to the ApigeeDataClient which is used for uploading and getting assets from entities.
Adding the assets sample application and updating the samples ReadMe.
Removed the static org name in the new assets sample project.
Missed a commit in the new asset upload code.
Updated asset_activity.java to AssetActivity.java
Removed static org name again.
Merge pull request #57 from RobertWalsh/master

Added ability to add/retrieve file assets to/from entities along with a sample app demonstrating how to do so.