HP-12C Platinum emulator

For the ones that prefer the Platinum HP-12C instead of the Gold version, here is the modified HP-12C emulator that mimics Platinum.

The main feature of Platinum is the algebraic mode for people that do not like the Reverse Polish Notation (l0sers :). But there are several minor revisions of HP-12C Platinum: with math bug, without math bug, with algebraic parenthesis, without parenthesis, 25th anniversary edition, and so on. The one I possess, and that I based my work on, has no support to algebraic parenthesis. And should not have math bugs :)