README: add more layer information

* add layer dependencies
* add maintainer name/contact
* document how to contribute

Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>

README

@@ -2,3 +2,34 @@ meta-games
 ==========
 
 Open Source games layer for OpenEmbedded.
+
+Maintainers
+===========
+
+Marko Lindqvist <cazfi74@gmail.com>
+
+Dependencies
+============
+
+This layer depends on:
+
+URI: git://git.openembedded.org/openembedded-core
+branch: master
+revision: HEAD
+
+URI: git://git.openembedded.org/meta-openembedded
+branch: master
+revision: HEAD
+
+Contributing
+============
+
+It is preferred to send patches as pull requests on the Github project directly,
+e.g. : https://github.com/cazfi/meta-games.
+
+If using Github pull requests is not possible, it is possible to send patches on
+the OpenEmbedded development mailing list. To send changes to mailing list use
+something like:
+
+    git send-email --to openembedded-devel@lists.openembedded.org \
+    --subject-prefix='meta-games][PATCH'