Removed old, unused msp430-based platforms
Removed pc-6001 platform
Removed the stepper-robot platform
Removed the stk500/stk501 platforms
Removed the redbee platforms
Removed the old esb regression tests
The pc-6001 platform was the last z80 platform in the tree, so we'll remove the cpu/z80 directory too
Merge pull request #438 from adamdunkels/push/cleanup-platforms

Massive platform cleanup