* Initial implementation of Asterisk Mailbox
* Rework asterisk_mbox handler to avoid using the hass.data hash. Fix requirements.
* Handle potential asterisk server disconnect. bump asterisk_mbox requirement to 0.4.0
* Use async method for mp3 fetch from server
* Add http as dependency
* Minor log fix. try to force Travis to rebuild
* Updates based on review
* Fix error handling as per review
* Fix error handling as per review
* Refactor voicemail into mailbox component
* Hide mailbox component from front page
* Add demo for mailbox
* Add tests for mailbox
* Remove asterisk_mbox sensor and replace with a generic mailbox sensor
* Fix linting errors
* Remove mailbox sensor. Remove demo.mp3. Split entity from platform object.
* Update mailbox test
* Update mailbox test
* Use events to indicate state change rather than entity last-updated
* Make mailbox platform calls async. Fix other review concerns
* Rewrite mailbox tests to live at root level and be async. Fixmailbox dependency on http
* Only store number of messages not content in mailbox entity
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