* Added some extra options to Weather Underground component
* Added Location and Elevation options
* Fixed if statement
* Fixed lint
* Updated tests including elevation and location
* Update wunderground.py
* Added the ability to Weather Underground to track severe weather alerts
* * Added message on the advisory attr
* Updated tests
* * Making use of guard clause
* Checking multiple_alerts prior loop
* Using a better way to create dict
* Fixed issue to set to None only the object that failed
* Added unittest
* Split update() method to different calls with their one throttle control to minimize API calls
* Updated unittest and make sure the alert sensor will not return 'unknown' status'
* Removed update() method from state property
* Branch rebased and include Weather Underground attribution
* Update wunderground.py
* Add event loop to the core
* Add block_till_done to HA core object
* Fix some tests
* Linting core
* Fix statemachine tests
* Core test fixes
* fix block_till_done to wait for loop and queue to empty
* fix test_core for passing, and correct start/stop/block_till_done
* Fix remote tests
* Fix tests: block_till_done
* Fix linting
* Fix more tests
* Fix final linting
* Fix remote test
* remove unnecessary import
* reduce sleep to avoid slowing down the tests excessively
* fix remaining tests to wait for non-threadsafe operations
* Add async_ doc strings for event loop / coroutine info
* Fix command line test to block for the right timeout
* Fix py3.4.2 loop var access
* Fix SERVICE_CALL_LIMIT being in effect for other tests
* Fix lint errors
* Fix lint error with proper placement
* Fix slave start to not start a timer
* Add asyncio compatible listeners.
* Increase min Python version to 3.4.2
* Move async backports to util
* Add backported async tests
* Fix linting
* Simplify Python version check
* Fix lint
* Remove unneeded try/except and queue listener appproriately.
* Fix tuple vs. list unorderable error on version compare.
* Fix version tests
