Feature changes:
- Add .epub import (feature 19). By @sakolkar in #82.
- Add resize frame option in reading pane. By @webofpies in #77.
- Add "dismiss" demo option, for users who don't want to wipe the db. By @dgc08 in #80.
- Nicer styling for the reading menu. By @webofpies in #72.
- Add Hindi and example to baseline. By @mzraly in #76.
- Update German sample story to new orthography. By @dgc08 in #81.
Back end changes:
- Fix javascript attribute names to standard. By @robby1066 in #79.
- Fix GitHub CI to really fail when things fail.
- Restructure book service to support epub import.