More error checking added on start
Logging is more efficient
track_state_change now accepts a list of entity_ids
Migrated wemo component to be part of a switch component
Added support for unit_of_measurement
Added support for tellstick devices and sensors
Minor fixes
Added sensors to demo component
Built frontend
Added requirements
Merge branch 'tellstick' of https://github.com/Gyran/home-assistant into tellstick

* 'tellstick' of https://github.com/Gyran/home-assistant:
  Minor fixes Added sensors to demo component Built frontend Added requirements
  Added support for tellstick devices and sensors

Conflicts:
	homeassistant/components/demo.py
	homeassistant/components/http/frontend.py
	homeassistant/components/http/www_static/frontend.html
	homeassistant/components/http/www_static/polymer/domain-icon.html
	homeassistant/components/tellstick_device.py
	homeassistant/components/tellstick_sensor.py