Move cdc_task and sicslow_ethernet over to ravenusbstick.
Raven USB LED changes.

Adds the following configuration options:

 * I_HATE_BLUE_LEDS
 * JACKDAW_CONF_ALT_LED_SCHEME
Miscellaneous raven/avr changes. (Need to clean this up)
Various tweaks to the uip network stack.

Added UIP_CONF_LOOPBACK_INTERFACE.
sicslowpan fix
CC253x/SDCC fixes.
cooja: Allow CFLAGS to filter thru
Revert "Cleaned up RF230BB, and refactored FRAME_RETRIES and CSMA_RETRIES"

This reverts commit b43dad00b0d598c7ee9f974b4a820a8fe5082d2e.

This change was reverted because it breaks the radio on
the `avr-raven` and `avr-ravenusb` platforms. The exact
cause of this regression has not yet been determined.

Conflicts:

	cpu/avr/radio/rf230bb/rf230bb.c
	platform/avr-ravenusb/contiki-conf.h
Various updates