added missing include to transceiver
fixed debugging in transceiver (stack size was too small)
add oneway calloc
Merge pull request #113 from mehlis/oneway-calloc

add oneway calloc
add sha256 implementation
Eliminate multiline macros, embrace C99
Fix byteorder problems
added doxygen doc to sha256
add a barrier for msba2 due to wrong results
Merge pull request #96 from mehlis/sha256

add sha256 implementation
add missing include for mutex
use std include style
remove unused static function
Merge pull request #122 from mehlis/hwtimer-fixes

Hwtimer fixes
minor error in sed expression
Merge pull request #106 from OlegHahm/802154_debugging

added missing include to transceiver
Implement simple echo request/reply
Set up new directory structure
Move error codes to public includes
Make sixlowpan module more coding conventions compliant