Merge tag '0.31.0' into develop

* Enhancements
  * Minor text update
* Bug fixes
  * Fixed crash in results activity when results couldn't be downloaded
  * Hide "erase my data" button until it's really implemented
  * [#407] Morning poll appears multiple times
BEQ notification is not persistent, so also not checked for

It *is* checked for when the BEQ type changes
If questionnaires are not answered, probes still continue
No need to turn 'Questions' button to red if not answered
side fix: don't show negative values for "daysToGo"
Update BEQ notification when finishing a morning questionnaire
Set back autocancel to true
Adapt notification text if questionnaires keep not being answered

Also change between begin and end questionnaires
Update notifications text
Merge pull request #411 from daydreaming-experiment/feature/issue-275-beq-notification

Feature/issue 275 beq notification
Allow moving app to SD card
Merge pull request #412 from daydreaming-experiment/feature/issue-334-sd-card

Allow moving app to SD card
Bump version
Update grammar versions
Update changelog
Merge branch 'release/0.32.0'