Getting Started Clarifications and Example Code File (#904)

* added URI link to README getting started

* revised comment

* added alternate module installation instruction

* installation troubleshooting comment

* scope clarification comment

* added playlist_add_items.py to examples folder

* reformatted changelog edits

* Relocated added contributions to added section in Changelog

* removed unnecessary library installation instruction

* Clarified alternative installation instruction

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Add alternative module installation instruction to README
+- Added Comment to README - Getting Started for user to add URI to app in Spotify Developer Dashboard. 
+- Added playlist_add_tracks.py to example folder
+
 ### Fixed
 
 - Update contributing.md