move the include of pin_config to uart.c
add a \n before \r in printfs
changing the license header of main.c
a first and incomplete SPI driver
minor typo
start writing spi_init()
some more of spi_init()
filled in spi_gpio_init()
minor fix to a comment
all interface lines should be pulled-up by default.
finished initializing spi; haven't tested yet
Merge branch 'spi'; includes initialization; hasn't been tested