Bugfix/simple audioservice (#1774)
Bugfix/simple audioservice (#1774)

* Use correct method to guess mime type

* Use the commands from mycroft.conf

- Remove hardcoded commands and use the ones from mycroft.util to handle
configurations.
- Improve error handling

Dark5ide/mycroft-core,forslund/mycroft-core,forslund/mycroft-core,linuxipho/mycroft-core,MycroftAI/mycroft-core,linuxipho/mycroft-core,Dark5ide/mycroft-core,MycroftAI/mycroft-core