Create README describing release publish process (#179)

Author: earlephilhower

package/README.md

@@ -0,0 +1,13 @@
+Publishing New Releases
+=======================
+
+GitHub CI Actions are used to automatically build a draft package whenever a tag is pushed to repo:
+
+    git tag X.Y.Z
+    git push origin X.Y.Z
+
+
+This will generate a draft release with a bulleted-list of ``git`` changes.
+Edit the list and title as desired, then use the ``Publish`` button on the web interface to publish the release
+
+At this point, a GitHub Action will run that will download the new combined ``JSON`` file from the tag and update the ``global`` release with it.