Add an installation doc

A quick doc for installation

Change-Id: I04702a3b665de506f9b3422ce8217537e8f6378d

doc/source/index.rst

@@ -7,6 +7,7 @@ Contents:
 .. toctree::
    :maxdepth: 2
 
+   install/index
    cli/index
 
 

doc/source/install/index.rst

@@ -0,0 +1,36 @@
+..
+  Licensed under the Apache License, Version 2.0 (the "License"); you may
+  not use this file except in compliance with the License. You may obtain
+  a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
+
+.. _guide-install:
+
+============
+Installation
+============
+
+If you are installing senlinclient from an OpenStack distribution, follow the
+guide provided by the vendor.
+
+If you prefer installing senlinclient from source repo, you can do it by
+first get senlinclient code from OpenStack git repository.
+
+::
+
+  $ cd /opt/stack
+  $ git clone https://git.openstack.org/openstack/python-senlinclient.git
+
+Then execute the following command
+
+::
+
+  $ cd python-senlinclient
+  $ sudo python setup.py install