Add README.md

Simply renamed about.md to README.md to aid navigation of the repo.

Change-Id: I612fc43913daa9cca9acdf14dfd968237de6a2f8

README.md

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+# Gerrit pull-replication plugin
+
 This plugin can automatically mirror repositories from other systems.
 
 Overview
 --------
 
 Typically replication should be done over SSH, with a passwordless
-public/private key pair.  On a trusted network it is also possible to
+public/private key pair. On a trusted network it is also possible to
 use replication over the insecure (but much faster due to no
 authentication overhead or encryption) git:// protocol, by enabling
 the `upload-pack` service on the receiving system, but this
-configuration is not recommended.  It is also possible to specify a
-local path as replication source. This makes e.g. sense if a network
+configuration is not recommended. It is also possible to specify a
+local path as replication source. This makes sense if a network
 share is mounted to which the repositories should be replicated from.
 
-Access
-------
+## Access
+
 
 To be allowed to trigger pull replication a user must be a member of a
 group that is granted the 'Pull Replication' capability (provided
 by this plugin) or the 'Administrate Server' capability.
 
-Change Indexing
---------
+## Change Indexing
+
 
 Changes will be automatically indexed upon replication.
+
+
+For more information please refer to the [docs](src/main/resources/Documentation)
+
+