[ADD] README

Author: StefanRijnhart

README.rst

@@ -0,0 +1,9 @@
+This is a dummy branch
+======================
+
+This project uses Github to host test database containing demo data for use
+in Travis CI. The databases are linked to a release on Github. Such releases
+need to be linked to a specific tag on a specific commit. This branch was
+created to host these tags so that we can have predictable links such as
+
+https://github.com/OCA/OpenUpgrade/releases/download/databases/8.0.psql