release notes file.

this is intended to help creating releases. this
file should be updated each time a commit is significant enough that it should be mentioned in
release notes.

when doing code reviews, reviewers should take this into account for approval.

RELEASE_NOTES.md

@@ -0,0 +1,11 @@
+# Filament Release Notes log
+
+This file contains one line summaries of commits that are worthy of mentioning in release notes.
+A new header is inserted each time a *tag* is created.
+
+
+# Release notes
+
+- Created a `RELEASE_NOTES.md` file, to be updated with significant PRs.
+
+## sceneform-1.9pr2