Bump version
Switch to production parameters
Update grammar versions
Update changelog
Merge branch 'release/0.19'
Merge tag '0.19' into develop

* Enhancements
  * Set different launcher icons for QA and Debug
  * Add some debug information to the test dashboard
  * Update parameter-downloading UI (if errored, restarts automatically)
  * [#229] Swipe in dashboard initiates self-report
  * [#196] Editable ManySliders questions type, for activity questionnaire
* Bug fixes
  * [#202] Dont' have two syncs running at the same time
  * [#218] Sntp resolving in dashboard when parameters are not set
  * [#178] Background JSON problems, and clean error hanlding and reporting