[add] README.rst file

README.rst

+Rednerd
+=======
+Rednerd is an innovative solution to produce transactional emails
+and documents in PDF or HTML format.
+
+It's designed to help applications or websites that need to send transactional
+email like password resets, order confirmations, and welcome messages.
+
+Rednerd offers advanced tracking, easy-to-understand reports & email
+templates.
+This Module allow you to use email template designed with mailjet app
+(languages uses in template must be mjml or mustache) which you can add
+in odoo template.
+It also allows the rendering of documents in pdf or html format.
+
+Configure this module using the following ``ir.config_parameter``::
+
+    rednerd.server_url = http://dockerhost:7000
+    rednerd.api_key = <your API key here>
+
+
+**Pro tip**: You can use mjml-app_ to prototype your email templates.
+
+UI Changes
+----------
+* Setting > Rednerd > Template
+
+Note: When you have existing templates you want to register onto a new
+rednerd server (or with a new user), multi-select them and click
+"Send to rednerd server".
+
+.. _mjml-app: http://mjmlio.github.io/mjml-app/