Merge branch 'feature/description-templates' into 'develop'

description templates

Closes #109

See merge request !81

.gitlab/merge_request_templates/Bugfix.md

+Well, it seems that it is impossible to write software without bugs. That's why
+we are really happy that you are here. Thank you very much! Please take a moment
+to help us include the purposed bugfix to SADE by filling out the following form.
+
+# Related Tickets
+Add all related issues and especially those to be closed. Keep in mind that every
+bugfix branch needs an issue that properly describes the bug beforehand. If your
+fix addresses something untracked, please open a ticket at first.
+
+## Related
+## Closes
+
+# Summary
+Apart from what is mentioned in the main ticket you are going to close with this
+MR, tell us what you have done to achieve this goal.
+
+# Changelog
+* [ ] I added a statement to the CHANGELOG.
+
+/cc @mrodzis @mgoebel

.gitlab/merge_request_templates/Feature.md

+We welcome every new feature to the upstream branch!
+
+But at first we ask you to fill in the following information about your feature.
+So please take a few minutes to make this great thing even better.
+
+# Summary
+This MR provides…
+
+# Use Cases
+If you can, please provide use cases for this feature.
+
+# Documentation
+Shall we add your feature to the documentation? There is a [feature list](docs/featurelist.md) available.
+
+## Function Documentation
+* [ ] Of course I prepared all my functions with an appropriate documentation.
+
+## Are there parts of the documentation we have to adjust?
+* [ ] No.
+* [ ] Yes, but I'd like someone else to do it.
+* [ ] Yes, and I already did!
+
+# Tests
+Are we able to test this new feature?
+* [ ] Yes, everything can be done via unit tests.
+* [ ] No, it is not possible.
+
+# Changelog
+* [ ] I added a statement to the CHANGELOG.
+
+# Related Tickets
+Add all related issues and especially those to be closed.
+
+## Related
+## Closes
+
+# Logs and Screenshots
+
+/cc @mrodzis @mgoebel