Added AT&T Speech-to-Text engine
Replace wront comment
Add a detailed docstring to ATandTSTT engine class
Improve Google STT engine.
Remove unused import from client/stt.py
Run APScheduler in daemon mode and shut it down at exit
Merge pull request #254 from Holzhaus/apscheduler-daemon-fix

Run APScheduler in daemon mode and shut it down at exit
Generate google-stt request_url only on api_key/language change and convert results to uppercase
Merge pull request #246 from Holzhaus/google-stt-engine-fixes

Improve Google STT engine.
Rename AT&T STT engine class to AttSTT
Merge pull request #244 from Holzhaus/att-stt-engine

Added AT&T Speech-to-Text engine
Improve logging on communication failure with marytts server
Merge pull request #256 from Holzhaus/marytts-logging-improvements

Improve logging on communication failure with marytts server
Migrate from APScheduler 2.1.2 to 3.0.1
Merge pull request #257 from Holzhaus/apscheduler-bump-to-v3

Migrate from APScheduler 2.1.2 to 3.0.1
Update versions in requirements file
sort requirements.txt file
Merge pull request #258 from Holzhaus/update-requirements

Update requirements
Added audioengine to make soundcards configurable and improved Mic.py.

Additionally, tts.py had to be changed so that it does not contain playback logic anymore.
Add audioengine.DeviceException base class