use debug instead of printf
added missing initialization for cc2420 abort counter
Merge pull request #177 from OlegHahm/cc2420_fixes

Cc2420 fixes
clean up nativenet, add src addr
documentation for nativenet interface
make tapsetup.sh more verbose
fix NATIVE_MAX_DATA_LENGTH
Merge pull request #170 from LudwigOrtmann/nativenet_cleanup_and_srcaddr

clean up nativenet, add src addr
add initial userland time api