create readmes

roles/postgres/README.md

@@ -0,0 +1,8 @@
+ Ansible role postgres
+-----------------------
+
+Ansible role to install postgresql for the pretix installation of this collection.
+
+This role is work in progress.
+
+

roles/pretix/README.md

@@ -0,0 +1,14 @@
+ Pretix Ansible Role
+=====================
+
+Ansible role ``l3d.pretix.pretix`` to install and configure [pretix](https://github.com/pretix/pretix.git), a Ticket shop application for conferences, festivals, concerts, tech events, shows, exhibitions, workshops, barcamps, etc.
+
+This role is part of the l3d.pretix Collection and work in progress!
+
+ License
+---------
+[MIT Licence](../../LICENSE)
+
+ Author
+--------
+L3D <[email protected]> and Contibutors