General cleanup of history sections.
Merge resolved.
Added times_seen info to storing of user knowledge on submission.
Merge branch 'master' of github.com:OpenPhilology/phaidra
Update exercises in introduction to verbs.
Merge branch 'master' of https://github.com/OpenPhilology/phaidra
Adapted vizualisation function to new user knowledge saving approach (esp. in statistics).
Merge branch 'master' of github.com:OpenPhilology/phaidra
Decommented sth I forgot to.
Update smyth references and exercises.
Revised filters of all resources and introduced filters in submission resource.
Merge branch 'master' of github.com:OpenPhilology/phaidra
Merge branch 'master' of github.com:OpenPhilology/phaidra
Redesigned and updated method of quizzing for vocab. Implemented basic answer checking and feedback to the user.
Alignment viewing enabled for vocab cards, as well as pulling related grammar content.
Updating slide content to suit flashcards.
More content updates, design changes, and additions to utils functionality.
Started moving lesson content to being smyth microlesson-based.
Moved json files out of js folder and into their own directory within static.
Reorganized smyth.json so the key is a field in the object, rather than the object key itself (for easier filtering).
Progress towards microlessons. Textbook material shows up for units that also exhibit a query.
Finally starting to automate the frontend build process.