msp430 timer: update comment in CounterMicro.

CounterMicro was incorrectly commented as Counter32kh.  Fix.

Fixes #159
bump msp430-47 to 20120911
doc/00a_Getting_Started: nuke github token, no longer needed

The github access methods used to require the token but they have changed things so this is no longer needed.   Remove from the getting started documentation.
Release spi bus resource before we return EBUSY in the rf212/rf230 radio driver.
fix whitespace changes
rfxlink: release the SPI bus after an unsuccessfull transmit attempt (do the same fo the other rfxlink radios)