Updated Raspberry Pi instructions and created RTEMS app framework

[Alan Cudmore]

Hi,
I have updated my Raspberry Pi RTEMS instructions here:
http://alanstechnotes.blogspot.com/2013/03/rtems-on-raspberry-pi.html

But probably of more interest to RTEMS users is my RTEMS App framework, 
which is here:
http://github.com/alanc98/rki

The RKI or RTEMS Kernel Image is my simple app framework that lets you 
get a fairly complicated RTEMS app up and running quickly. It supports a 
RAM disk, NVRAM disks, shell startup with init script, network setup, 
and has some example shell commands such as the whetstone and dhrystone 
benchmarks.

The project has makefiles for sparc-rtems4.11 / sis and arm-rtems4.11 / 
raspberrypi
It may run on RTEMS 4.10, but I recently updated the RAM disk init code 
for 4.11 and have not tried it on 4.10 yet.

Alan