[TASK] Add basic documentation

README.md

+# Sitemap Package for big website based on Neos CMS
+
+This package provide the infrastrucutre to build sitemap.xml for big website based on [Neos CMS](https://www.neos.io)
+
+This package use job queue to generate a static sitemap.xml when a node path change. You can configure how the sitemap
+build should work by different presets.
+
+**Package under development, API can change at any time**
+
+How to use ?
+------------
+
+Edit your distribution [Settings.yaml](Configuration/Settings.yaml) for configuration:
+
+    Ttree:
+      Neos:
+        Sitemap:
+          presets:
+            default:
+              include:
+                'TYPO3.Neos.NodeTypes:Page': TRUE
+              skip:
+                'TYPO3.Neos:Shortcut': TRUE
+              type: 'single'
+
+Basically you can configure the NodeType who need to be in the sitemap, and an optional list of NodeType that need to 
+be skipped.
+
+Currently to Job Queue is not supported but you can use the CLI command::
+
+```
+FLOW_REWRITEURLS=1 ./flow sitemap:generate --site-node-name architectesch --base-url http://www.architectes.ch/ --preset default
+```
+
+__Warning__: The environnement variable ```FLOW_REWRITEURLS``` is required in CLI to have proper URI building
+            
+What's next ?
+-------------
+
+- Implement type: "multiple", to generate multiple sitemap with one index
+- Implement asynchronous sitemap generation based on Job Queue
+- Integrate with Neos.SEO package for advanced configuration per document
+
+Acknowledgments
+---------------
+
+Development sponsored by [ttree ltd - neos solution provider](http://ttree.ch).
+
+We try our best to craft this package with a lots of love, we are open to
+sponsoring, support request, ... just contact us.
+
+License
+-------
+
+Licensed under MIT, see [LICENSE](LICENSE)