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
added AT86RF231 payload size
bugfixes : #endif was missing, and TRANSCEIVER_AT86RF231 was colliding with another transceiver.
fixed some ifdefs and added necessary includes to transceiver.h
fixing ifdef/elif construct around prototypes in transceiver.c
added missing FCS to IEEE802.15.4 adaptation layer
updated ICMPv6 types from I-D to RFC values
updated license headers

(No code changes!)
added the release notes for 2013.08
Inform about submodule and added tarballs
fixed formatting
Fix transceiver documentation
add debug statement