Merge pull request #38 from Marenz/relnotes

Prepare release notes

Author: Marenz

RELEASE_NOTES.md

@@ -2,7 +2,8 @@
 
 ## Summary
 
-<!-- Here goes a general summary of what this release is about -->
+This release contains a few breaking changes that were required to enhance the
+API.
 
 ## Upgrading
 
@@ -15,7 +16,3 @@
 - A new module `frequenz.client.dispatch.test` has been added, providing a fake Service and Client as well as a `DispatchGenerator` to generate `Dispatch` instances filled with random data.
 - The `DispatchGenerator.generate_dispatch` method now accepts a `microgrid_id` parameter to generate `Dispatch` instances with a specific microgrid ID.
 - The `Client.create()` method now returns the newly created `Dispatch` object.
-
-## Bug Fixes
-
-<!-- Here goes notable bug fixes that are worth a special mention or explanation -->