Adds release notes in releases/Notes.md

releases/Notes.md

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+
+# Music Suite Releases
+
+## 1.3
+
+* Better pitch representation
+
+* Better documentation
+
+* Adds Lilypond backend
+
+## 1.4
+
+(no changes)
+
+## 1.5
+
+(no changes)
+
+## 1.6
+
+* Adds meta-data
+
+* Allow arbitrary bar length
+
+* New type `Span`
+
+* Improved definition of score, voice and other time types using `Span`
+
+* Better part representation
+
+* Adds literals for dynamics and intervals
+
+* Better midi export
+
+* Adds auto-merging of simultaneous notes into chords
+
+* Adds Sibelius import (experimental)
+
+* Adds heuristic voice separation (experimental)
+
+* Examples
+
+## 1.7
+
+
+* Adds `.music` file parsing and conversion
+
+* Adds many new time-based types
+
+    * Separates time- and score-types in in `Music.Time` and `Music.Score` hierarchy
+
+    * Adds delayed and stretched values
+
+    * Adds segments
+
+    * Improves interface to `Behavior` (and `Segment`) in terms of `Representable` from `adjunctions`
+
+    * Adds chord type
+
+    * Adds time-varying pitch, dynamics and articulation
+
+    * Adds laws for `Reversible` and `Splittable`
+
+* Garbage-collect API:
+
+    * Merges classes `Delayable` and `Stretchable` into `Transformable`
+
+    * Merges classes `HasOnset` and `HasOffset` etc. into `HasPosition`
+
+    * Proper implementation of `Span`, as a real abelian group.
+
+    * Replaces all ad-hoc conversion functions with lenses, isos and prisms
+
+    * Changes API to use lenses more thoroughly, i.e. `place :: (HasPosition a, Transformable a) => Lens' a Span`.
+
+* Adds polymorphic update of pitch, dynamics and articulation
+
+* Adds phrase-wise traversal
+
+* Adds test suite
+
+* Adds more examples