compatibility fixes and add reimplementations

app/corpora/__init__.py

app/corpora/cqi/models/subcorpora.py

app/corpora/events.py

app/corpora/forms.py

app/corpora/pj_events.py

app/corpora/pj_forms.py

app/corpora/pj_views.py

app/static/js/nopaque.CorpusAnalysisClient.js

app/static/js/nopaque.analyse_corpus.js

app/static/js/nopaque.lists.js

app/templates/corpora/analyse_corpus.html.j2

app/templates/corpora/pj_analyse_corpus.html.j2