improve download progress when download already partially started
improve datamodel documentation: add the external dependencies to the diagram
start working on students groups
students group: datamodel update + datamodel migration
still all pages and services to adapt to the new datamodel
students groups: tree almost ok, students list almost ok
still in progress...
assign students to groups
students groups: list with sub-grouping
students groups: map
students groups: teachers page
fix 0.0.77 migration
start teachers assignments adaptation
continue adaptation of teachers assignments
done with adaptation of teachers assignments
adapt teacher profile
adapt screen for a teacher's assignments
adaptation of students_grades screen
adaptation of screen subject_grades
adaptation of transcripts page
adaptation and improvement of transcripts
Merge branch 'master' of https://github.com/passerellesnumeriques/Students-Database into dev

Conflicts:
	www/component/curriculum/datamodel_display.inc
move to version 0.0.78
finalized adaptation of transcripts with new information and groups of students