Merge branch 'master' into davidkopf

Conflicts:
	core/net/uip-ds6.h
	cpu/avr/radio/rf230bb/halbb.c
	examples/webserver-ipv6/Makefile
	platform/avr-atmega128rfa1/contiki-main.c
radio mote interface isReceiverOn() method was renamed to isRadioOn()
bugfix: simulations can be created with firmwares only, and do not require source files
avr debugger updatespatch by david kopf
ensure mote exists before observing it
moved duplicated code to MoteID, to be shared by many MoteID implementations
implemented Cooja memory support for Avrora-based motes, and support for MemoryMonitors
create Avrora mote ID interface to be shared among Avrora-based mote implementations
using shared AvroraMoteID: simplifying or removing platform-specific Mote ID interface implementations
patch by david kopf, ref:0001-Change-avrora-serial-to-use-generic-mote-types-chang
cleanup of shared AvroraUsart1.java, patch by david kopf
patch by david kopf, ref:0002-Change-node_id-interpretation-for-udp-ipv6-server-cl
Fix lower register coloring on word read. Maintain register box contents across visualizer close and open.
Handle TX_ARET seqence properly. Still some bug that leaves TX on after a lot of interfering activity
bugfix: exception when selecting zoom slider, patch by david kopf
atmega128rfa1 radio not hanging in transmit any more. udp client/server working well with 4 contikimac nodes!
removed unused RFA1Clock and MicaClock implementations
made AvroraClock the only Clock interface, to not cause problems with the get/setDrift
removed no longer needed Terminal
Fix avrdebugger null pointer on close; improve clock display.