added missing include to transceiver
fixed debugging in transceiver (stack size was too small)
minor changes according to 7a2cc4ae096a90308c026dd857e19b4489b162cf
started adding at86rf231 driver

at86rf231 TX and RX

driver is using vtimer instead of hwtimer_ functions, TO CHECK

vtimer debug function prototype fix
bugfixes related to size and buffers
added AT86RF231 payload size
bugfixes : #endif was missing, and TRANSCEIVER_AT86RF231 was colliding with another transceiver.
fix priority comparison in sched_switch
add the default wrapper for sha256
minor error in sed expression
Merge pull request #106 from OlegHahm/802154_debugging

added missing include to transceiver
removed unmaintained code for LPC214x MCU
removed unmaintained logd library
removed unmaintained syslog library
removed unmaintained tracelog library
removed unmaintained micro mesh routing code
Merge pull request #124 from mehlis/sha256

add the default wrapper for sha256
Merge pull request #108 from OlegHahm/unmaintained_libs

removed unmaintained code
clean up of ifdefs in transceiver module
change python shebang to python2 -> python is mostly python3