Trying to improve x49gp

[Claudio L.]

I packed the bootloader code and requested upload to hpcalc.org.
I also committed a few changes:
* Removed all binary files from the repository
* Created a 'firmware' folder, empty in the repository, that will receive all the binary files
* Made the changes in the code so it looks for the bootloaders in that firmware folder
* Added a bash script (pull-roms.sh) that pulls and extracts the official ROM 2.15 from hpcalc.org, the bootloaders (when the file becomes available I may need to fix the name, we'll see), and the latest unofficial newRPL rom image. All binaries are placed into that 'firmware' folder.

So everything is ready to receive a license file making it explicitly GPL, I don't think there's any other issues that could prevent someone from making clean (as in not in violation of anything) binary packages for Linux. They just need to run the pull-roms.sh script as a post-install script.

Now we just wait for the file to go live on Eric's website...