minor changes according to 7a2cc4ae096a90308c026dd857e19b4489b162cf
fix priority comparison in sched_switch
Merge pull request #126 from OlegHahm/scheduler_fix

fix priority comparison in sched_switch
fix minor typo in status output
Merge pull request #112 from OlegHahm/msb430_uart0

Changes according to the pull requests from https://github.com/RIOT-OS/boards/commit/dc5e7d7e1f62c787262a430d191764387c7242fd introducnig uart for MSB430 and changing the name of the terminal variable.
Implement simple echo request/reply
Set up new directory structure
Move error codes to public includes
Make sixlowpan module more coding conventions compliant
Add documentation group for 6LoWPAN module
Update documentation of ipv6.h
Make usage of IPHC configurable.
added callback registration for sixlowip
added callback for sixlowpan
Refactor mac.h
Refactor lowpan.h
Refactor border.h
Refactor ip.h [not done yet]