improvements... except now arm mode set_register for r15 doesn't work right... prolly...

improvements... except now arm mode set_register for r15 doesn't work right... prolly to do with fixing dclk timing issues.  never was set up the way the docs said to.  that must have been why it worked.
however, thumb to arm and arm to thumb work well... get/set regs in thumb mode work relatively well.
need to iron out get/sets and then fix offsets for halt/resume so we hit the right instruction on exit.  then work on the watch/breakpoints and continuing...
also need to work on the get/set multiple regs and then read/writemem of large chunks...  using multiple regs :)

git-svn-id: https://svn.code.sf.net/p/goodfet/code/trunk@710 12e2690d-a6be-4b82-a7b7-67c4a43b65c8