Clear release notes (#98)

Author: llucax

RELEASE_NOTES.md

@@ -2,22 +2,16 @@
 
 ## Summary
 
-This release mainly introduces the `LogicalMeter`. There should be no breaking
-changes.
+<!-- Here goes a general summary of what this release is about -->
 
-## New Features
+## Upgrading
+
+<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with --> 
 
-- A logical meter implementation that can apply formulas on resampled component
-  data streams.
+## New Features
 
-- The `ComponentGraph` now supports *dangling* inverters, i.e. inverters
-  without a successor. This is mainly to support PVs inverters. In the future
-  *dangling* inverters will be forbidden again but only for batteries.
+<!-- Here goes the main new features and examples or instructions on how to use them -->
 
 ## Bug Fixes
 
-- The component graph expected inverters to always have successors, and so
-  wasn't able to support PV inverters, which don't have component successors.
-  This is resolved by temporarily removing the requirement for inverters to have
-  successors.  This will be partially reverted later by expecting just battery
-  inverters to have graph successors.
+<!-- Here goes notable bug fixes that are worth a special mention or explanation -->