New Acron RPN Calculator for Android

[vanLudwig]

I just pushed a new beta build to the Play store. You can try it using the following links:

Full Version:
https://play.google.com/apps/testing/com...calculator

Free Version:
https://play.google.com/apps/testing/com...lator.free

If no one finds any new bugs in the next day or so, I'll move the beta to a full release.

Addressed issues:
- Performance is significantly improved, especially on Android 4.x devices. I accomplished this be only doing partial redraws until the device has sat idle for 2.5 seconds. So, be on the lookout for drawing glitches that rectify themselves after a short wait.

- Added support for numeric locales that don't use a period as a decimal. This should draw using your locale's decimal, including the label on the decimal button.

- Swapped the zero and decimal button locations.

- Fixed a scaling issue when switching between bases.