Merge pull request #471 from OlegHahm/makefile_cleanup

Makefile cleanup
removed useless include
added missing include
Added the LPM_UNKNOWN constant to the enum 'lpm_mode'
for respresenting unknown/unavailable LPM-related status.
function 'lpm_get()' now returns LPM_UNKNOWN by default
Merge pull request #477 from mehlis/fix-ccn-includes

Fix ccn includes
nativenet clean up

Make nativenet tap payload type consistent with radio_packet_t
Also remove a trailing space
check payload length validity

make sure the payload does not exceed the amount of data received
strip BOARD variable
cosmetics in dist Makefile
fix some findings by the static analyser
remove superflous include
add native flash and term targets

flash does nothing
term starts the project with PORT misused for the tap interface
PORT is unset if nativenet is not used
Merge pull request #487 from LudwigOrtmann/issue_314

add native flash and term targets
Merge pull request #481 from OlegHahm/makefile_fixes

Makefile cosmetics
merge over options from projects/default/Makefile

add scheduler statistics option
add valgrind option
add develhelp option
Improve text and stop overriding useful variables
Merge pull request #486 from LudwigOrtmann/native_startup_cosmetics

remove superflous include in native startup
Merge pull request #485 from LudwigOrtmann/makefile_cleanup_2

Makefile cleanup 2
Merge pull request #473 from LudwigOrtmann/nativenet_osx_xmas

add io signal generating child for nativenet in osx