Update Tacker README.rst with new project scope and pointers

Change-Id: I61171b08ab58e3769e9dd1ab01c474727efe9cad

README.rst

@@ -1,19 +1,42 @@
 Welcome!
 ========
 
-Tacker is an OpenStack based VNF Manager service and a framework used to
+Tacker is an OpenStack based NFV Orchestrator service with built-in general
-deploy and operate Virtual Network Functions (VNFs) on an OpenStack
+purpose VNF Manager to deploy and operate Virtual Network Functions (VNFs)
-based NFV Platform.
+on an OpenStack based NFV Platform. It is based on ETSI MANO Architectural
+Framework and provides full functional stack to orchestrate VNFs end-to-end.
+
+Installation:
+=============
+
+Installation instructions:
+https://wiki.openstack.org/wiki/Tacker/Installation
+
+**MUST READ: Important Note:**
+
+Tacker code base currently ONLY works with OpenStack stable/kilo release
+components (including devstack, nova, neutron, etc). Please follow the
+instructions in the above wiki for a successful installation.
+
+Code:
+=====
+
+Tacker code is available in following repositories:
+
+* **Tacker server:** http://git.openstack.org/cgit/stackforge/tacker
+* **Tacker Python client:** http://git.openstack.org/cgit/stackforge/python-tackerclient
+* **Tacker Horizon UI:** http://git.openstack.org/cgit/stackforge/tacker-horizon
+
+Bugs:
+=====
+
+Please report bugs at: https://bugs.launchpad.net/tacker
 
 External Resources:
 ===================
 
-The homepage for Tacker is: http://launchpad.net/tacker.  Use this
-site for asking for help, and filing bugs. Code is available on
-git.openstack.org at <http://git.openstack.org/cgit/stackforge/tacker>.
-
 Tacker Wiki:
 https://wiki.openstack.org/wiki/Tacker
 
 For help on usage and hacking of Tacker, please send mail to
-<mailto:openstack-dev@lists.openstack.org> with [tacker] tag.
+<mailto:openstack-dev@lists.openstack.org> with [Tacker] tag.