improved handling of battery power sampling
more improved handling of battery power sampling
removed WakeupReceiver, simplified so we can build for Android 2.3 (API 9)!
Android 4.2 is the minimum API we can do

We use the GridLayout, which requires Android 4.0 and nano-time, which requires Android 4.2. We don't *really* need nano-time (it's only used to precisely measure frame rate reporting), but 4.2 seems like a more reasonable minimum than 4.4.
release2a apk