Merge tag '0.27.0' into develop

* Enhancements
  * [#265] Add a bonus-aware progress indication in sequences
Update strings.xml

Typos
Update description

Update this very old version
Merge pull request #358 from MklBst/master

Update terms and description
Missing space
adding/updating drawables for activity and status icons
Merge pull request #367 from daydreaming-experiment/feature/new-drawables

adding/updating drawables for activity and status icons
Merge branch 'develop' of github.com:daydreaming-experiment/app into develop
Update to API 20
Update contribution guidelines
Update travis build rules
Also bump API in library
Merge pull request #369 from daydreaming-experiment/feature/issue-110-latest-api

Update to latest API
Fix autolist font size
Implement and move to grammar v3.1

This commit also fixes the removal of the intro text: the whole intro layout is
removed if the intro text is empty, so we gain more space than before.
Merge pull request #370 from daydreaming-experiment/feature/issue-360-grammar-v3.1

Feature/issue 360 grammar v3.1
adding erase my data button, alertdialog security, no action yet
adding selector
externalise text
Merge pull request #371 from daydreaming-experiment/feature/erase-my-data

Feature/erase my data