Arduino timer implementation without external library
Merge remote-tracking branch 'upstream/master' into timer_ISR
added prescaler value which depends on F_CPU
changed node id assignment and added debug messages
some fixes
using TIMER1 and merging arduino task implementation from inse-arduino branch
Merge branch 'timer_ISR'

Conflicts:
	wiselib.testing/external_interface/arduino/arduino_application.h
	wiselib.testing/external_interface/arduino/arduino_timer.h
minor changes to timer example
Merge remote-tracking branch 'upstream/master'
fixes to xbee interface
Merge branch 'xbee_module'

Conflicts:
	apps/arduino_apps/xbee_radio_app/Makefile
	apps/arduino_apps/xbee_radio_app/example_app.cpp
	apps/arduino_apps/xbee_radio_receive_app/Makefile
	apps/arduino_apps/xbee_radio_receive_app/example_app.cpp
	wiselib.testing/external_interface/arduino/arduino_xbee_radio.h

merging xbee branch
bluetooth module updated
Merge branch 'xbees2_module'

Conflicts:
	wiselib.testing/external_interface/arduino/arduino_xbee_radio.h

xbee conflict resolved
Minor fixes and final cleaning
Change 'tabs and spaces' to 'tabs only' in Makefile.isense
Change readme file
Update readme file
removed unnecessary toggling of pin 12 from within arduino application
Merge pull request #60 from Xennis/master

Change 'tabs and spaces' to 'tabs only' in Makefile.isense
Merge branch 'master' into parita-master

Conflicts:
	wiselib.testing/external_interface/arduino/arduino_application.h
	wiselib.testing/external_interface/arduino/arduino_bluetooth_radio.h
	wiselib.testing/external_interface/arduino/arduino_task.h
	wiselib.testing/external_interface/arduino/arduino_timer.h
	wiselib.testing/external_interface/arduino/arduino_xbee_radio.h