[stm32] simplify led setup
[sim] gpio_arch: don't provide stm32 specific functions
[peripherals] add lsm303dlhc driver for accel and mag
[peripherals] l3gd20 gyro sensor added
[boards] stm32f4_discovery: fix SPEKTRUM_UART naming
[test] fix test_sys_time_x
[boards] tiny/twog: fix led color comments
[gpio] move gpio_setup_x declarations to implementation

properly document that you can actually set multiple gpios at a time
[lpc21] implement gpio functions
[lcp21] fix gpio_toggle
[datalink] w5100: arch indep gpio functions for drdy pin
[modules] Removed GPS_PORT_ID, added comments, and compile warnings if GPS_PORT_ID is defined.