Bump version
Update grammar version
Update Changelog
Merge branch 'release/0.17'
Merge tag '0.17' into develop

* Enhancements
  * [#164] Use storage efficiently
  * [#117] Generalized sequences builder with corresponding grammar v3 basis
  * [#163] Switch to Jackson for JSON handling (answers weren't serialized)
  * [#121] Add glossary in dashboard, link it to questions
  * [#114] Implement bonus slots and relative positioning of items
  * Redesign About page
* Bug fixes
  * [#162] Questions gone beserk
  * [#159] Restart lost background services when reopening dashboard
  * [#179] Deserialization failing, switch to JSON Views in Jackson