Update docs for API changes in v0.8.0

Should include:

• !215 (merged)
• !251 (merged)
• !263 (merged)

changed milestone to %0.8.0

added To Do modul/docs labels

mentioned in merge request !215 (merged)

changed the description

mentioned in merge request !263 (merged)

assigned to @she

Should be fixed with 15357494 but we should test our documentation

Fixed with e9dca29d and 1527e656.

closed