48sx, a vintage RPN calculator

1/2/2016

* Intended to work from android 2.2 to 6.x on armeabi, armeabi-v7a,
arm64-v8a, mips, mips64, x86 and x86_64 architectures
* New amazing skin, should be more readable on big screens
* New action bar with icons and menu when touching HP48sx screen
* New icon
* Complete fullscreen for android 4.4, 5.x and 6.x
* Corrected port2 settings
* Haptic feedback disabled by default, but can be re-enabled