Add features of our presentation branch

We have introduced small hot-fixes for our presentation. These still have to be transferred to the theodolite-kotlin branch. These are mainly:

• wait for the future of create topics
• catch exeception when deleting executions

added Master Project 20/21 Theodolite Kotlin labels

mentioned in issue #206 (closed)

added To Do label

added In Progress label and removed To Do label

mentioned in merge request !121 (merged)

changed milestone to %0.5.0

added Bug label

marked the checklist item wait for the future of create topics as completed

marked the checklist item catch exeception when deleting executions as completed

fixed in !121 (merged)

closed

removed In Progress label