* Move more constants to const.py
* Import constants directly from const
* ATTR_ENTITY_ID is not defined in media_player
* MEDIA_PLAYER_PLAY_MEDIA_SCHEMA is still in __init__.py
* Correct imports in tts
* PLATFORM_SCHEMA, SCHEMA is still defined in __init__.py
* Pandora imports several services
* Some additional fixes for move of const in media_player
* Fix hound lengths
* Add python 3.7 to travis and tox
* Use pyyaml from github
* Don't version constraints
* Fix version tag
* Change to new pyyaml release
* Python 3.7 requires xenial
* Fix namespace detection
* Use correct RegEx type
* Update pexpect to 4.6
* Use correct validation for dictionaries
* Disable Py37 incompatible packages
* Upgrade all pexpect to 4.6
* Add explicit None as default param
* Pandora cleanups and enhancements
Added media_content_type
reduced debug messages
made more robust station list
Eliminated auto-pause detection issue
* Added proper de-init of LIRC
* Now won't re-spawn Pandora client if turn_on command is sent twice
* Added Pandora media player utilizing the Pianobar client
* Added Pandora to .coveragerc ignore
* Fixes some docstring formats in Pandora
* More minor formatting tweaks for Pandora
* Eliminated non-portable assumption from Pandora component
* Updated Pandora to properly update currently-playing song.
* Docstring fixes in Pandora
* Added check to ensure Pianobar client is available in path for Pandora.
* Made Pandora client verification a function instead of method.
* Better handling of dependency verification in Pandora.