Evaluations bloquées jusqu'à une date. Implements #858

app/but/bulletin_but.py

app/comp/moy_mod.py

app/comp/res_common.py

app/models/evaluations.py

app/models/formsemestre.py

app/scodoc/sco_bulletins.py

app/scodoc/sco_bulletins_json.py

app/scodoc/sco_evaluation_edit.py

app/scodoc/sco_evaluations.py

app/scodoc/sco_excel.py

app/scodoc/sco_moduleimpl_status.py

app/scodoc/sco_saisie_notes.py

app/static/css/scodoc.css

app/tables/recap.py

app/templates/assiduites/pages/etat_abs_date.j2

app/views/notes.py

migrations/versions/cddabc3f868a_evaluation_bloquee.py