48sx, a vintage RPN calculator

Aug 13, 2015

!!!!!!!!!!!! Please do a "Full reset" !!!!!!!!!!!!

* Corrected "put program on stack" bug
* Corrected FC bug on android 4.3
* Corrected random freeze on android 4.4
* Data files are now stored on /sdcard/Android/data/org.czo.droid48sx/files
* Menu is displayed when touching HP screen
* New menu : Save checkpoint
* New menu : Restore checkpoint
* New menu : Full reset