docs: refresh & structure overhaul

Rework the doc in order to improve the navigation experience and to make
it easier to update the doc:

- simplify structure: docs/{release-notes,user,developer}
- recreate sphinx config file
- switch theme from opnfv to piccolo
- fix minor rst issues
- fix external references
- add missing license headers (add a short header with copyright and
  SPDX license identifier to the files lacking the information.  The
  header is based on https://github.com/david-a-wheeler/spdx-tutorial)

Change-Id: I9a1135a2873d9955beb26760e0cb6c5d6c1326bd
Signed-off-by: Gwenael Lambrouin <gwenael.lambrouin@orange.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/docs/user/index.rst b/docs/user/index.rst
new file mode 100644
index 0000000..65b6c2a
--- /dev/null
+++ b/docs/user/index.rst
@@ -0,0 +1,35 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. SPDX-License-Identifier: CC-BY-4.0
+.. (c) Cisco Systems, Inc
+
+
+.. NFVBench documentation master file, created by
+   sphinx-quickstart on Thu Sep 29 14:25:18 2016.
+
+
+*******************
+NFVbench User Guide
+*******************
+
+The NFVbench tool provides an automated way to measure the network performance for the most common data plane packet flows on any OpenStack system.
+It is designed to be easy to install and easy to use by non experts (no need to be an expert in traffic generators and data plane performance testing).
+
+
+Table of Contents
+
+.. toctree::
+   :maxdepth: 3
+
+   readme
+   installation
+   examples
+   advanced
+   pvpl3
+   xtesting
+   mpls
+   extchains
+   fluentd
+   kibana
+   sriov
+   server
+   faq