Feature/several days in one tex document #288

Bugfix/mobile plan

Change permissions for support views (issue #301)

Sort objects in plan overview (issue #303)

# Conflicts:
#	schoolapps/templates/partials/footer.html

Bugfix/no mobile smartplan

# Conflicts:
#	schoolapps/templates/partials/footer.html

Feature/summarize hour blocks #287

Bugfix/absence.is whole day #291

inspect hast du vermutlich nur zu Testzwecken verwendet

Apply merging of sub rows for HTML table, too | Refactor and comment | Add __eq__ to API objects to improve matching

add two funtions equal() and merge_subs() to summarise lessons with same attributes, there's some tidying up to do

Feature/skip parallel courses #285

two simple changes

rename class to aktuell in generate_pdf, exclude flags b (Verfügungsstunde) and F (Lehrerfrei) in get_substituitions_by_date