Update script - alignment error.
Merged.
Update pluperfect unit.
Changed saving of user knowledge on submission.
Merge solved.
Merge branch 'master' of https://github.com/OpenPhilology/phaidra
Added smyth refs for third declension nouns, and update to make noun slides correct.
Merge branch 'master' of github.com:OpenPhilology/phaidra
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.