Replace direct http requests by sahara client in Quick start guide
Replace direct http requests by sahara client in Quick start guide

Added Sahara client requests and output to developer reference
quickstart guide. Added parameters and output related to Neutron.
Cleaned various grammatical and spelling errors. Removed unwanted
whitespace characters.

Change-Id: Idad3f346fba6011cc13bd212e8a6aa70b48c4e90
Closes-Bug: 1392768

bigfootproject/sahara,ekasitk/sahara,bigfootproject/sahara,zhujzhuo/Sahara,ekasitk/sahara,zhangjunli177/sahara,zhangjunli177/sahara,tellesnobrega/sahara,esikachev/sahara-backup,tellesnobrega/sahara,zhujzhuo/Sahara,redhat-openstack/sahara,egafford/sahara,matips/iosr-2015,egafford/sahara,matips/iosr-2015,matips/iosr-2015,bigfootproject/sahara,henaras/sahara,zhangjunli177/sahara,henaras/sahara,esikachev/sahara-backup,esikachev/sahara-backup,zhujzhuo/Sahara,ekasitk/sahara,openstack/sahara,redhat-openstack/sahara,henaras/sahara,crobby/sahara,crobby/sahara,crobby/sahara,openstack/sahara,redhat-openstack/sahara