make SPI debug format bus-pirate compatible
add main infrastructure - uart loopback 9k6
move files to top level directory
change MSP430 type in Makefile
move util folder to top level
make test modules for gps,si4060,util
SPI fixes, si4060 init

spi write command now also returns the RXed byte. SPI init is done in
code now, but seems not to be working (tbc). main()-testcode monitors
the configured GPIOs, which seem not to get initialised.

further investigation is needed here!
add func prototype for i32toa
move si4060 power up before setup
add SPI hardware functions
remove hardware access from si4060.c, fix typos

this commit cleans up some debugging outputs from the si4060 and fixes a
define bug, which misspelled TCXO
clean up main, finish HW init

HW is now initialized properly. si4060-reset is done in main, which may
change in the future.

state up to now is: si4060 is responding to all commands with correct
CTS, except after "power up" ... it remains unresponsive afterwards,
only a full reset helps ...

chip id (part_info) can be read correctly, and a correct read is
indicated by turning of one LED on the fraunchpad.