Separated "help"

Help page is separate now.
Removed the bulk of it from various pages.

Signed-off-by: Olivier Gambier <olivier@docker.com>

docs/help.md

@@ -0,0 +1,19 @@
+<!--GITHUB
+page_title: Getting help
+page_description: Getting help with the Registry
+page_keywords: registry, service, images, repository, help
+IGNORES-->
+
+# Getting help
+
+If you need help, or just want to chat, you can reach us:
+
+- on irc: `#docker-distribution` on freenode
+- on the [mailing list](https://groups.google.com/a/dockerproject.org/forum/#!forum/distribution) (mail at <distribution@dockerproject.org>)
+
+If you want to report a bug:
+
+- be sure to first read about [how to contribute](https://github.com/docker/distribution/blob/master/CONTRIBUTING.md)
+- you can then do so on the [GitHub project bugtracker](https://github.com/docker/distribution/issues)
+
+You can also find out more about the Docker's project [Getting Help resources](https://docs.docker.com/project/get-help).