WP 34S --> WP 31S

[Jonathan Cameron]

We have integrated Bit's ydisplay mod into the WP-31s code. Marcus has built a version with the following options enabled:

* INCLUDE_YREG_CODE (shows Y in the upper display area)
* PRETTY_FRACTION_ENTRY (switches to fraction display mode instantly when a second radix is pressed)
* RP_PREFIX (polar y-register prefix)

If you would like to try it, the windows gui and the flash image have been rebuilt at:

http://sourceforge.net/p/wp34s/code/HEAD...hes/wp31s/

We would like you to try this update and let us know if you encounter any issues with it, or just like it, please let us know!

If you want to test the QtGui version, I have a parallel build on 64-bit Ubuntu 12.04 that I can make available for you (PM me).

-Jonathan