x00t!

arm jtag on goodfet is a reality!
or at least most of the hurdles have been conquered.
ARMreadMem works now.  it turns out i was haphazardly running through RUNTEST/IDLE willy nilly, which was messing up the RESTART/BRKPT magic.

still todo:
* complete and test writeMem
* add flash-writing (may need to implement in specific subclasses)
* create goodfet.arm for command-line access
* prettify and complete GoodFETARM7, rename jtagarm7tdmi.h
* create specific subclasses for actual arm7 chips (at91r40008, at91sam7, etc...)

git-svn-id: https://svn.code.sf.net/p/goodfet/code/trunk@693 12e2690d-a6be-4b82-a7b7-67c4a43b65c8