Remove carriage returns

Git for windows handles those by itself
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
astyle coding convention fixes
remove static for vtimer_print
fixed some ifdefs and added necessary includes to transceiver.h
added missing header guards
undefined payload before setting for native
Preliminary OSX support hack