0.6.0: use com.android.tools.build artifacts

Probably breaks if not at least on SDK rev22
Allow adb-wifi to run without androidBuildSettings (needs ANDROID_HOME)
Remove android sdk libraries in plugin
Update library dependencies
Add 'platformTarget' to allow definition without project.properties
Start using AndroidBuilder, remove deprecated BuildConfigGenerator
Merge branch 'master' into sbt-0.11
0.6.1: fix build, no more including libs/
Merge branch 'master' into sbt-0.11