Relax minimum API requirements
Update the project build field

This change is automatically added after running:
`android update project -p .`

This is based on an answer at:
http://stackoverflow.com/questions/16620655/i-have-updated-android-sdk-to-rev-22-yesterday-and-there-is-no-apkbuilder-in-to#comment24520524_16620664
bump version
remove local.properties from repo