bug 1192994 Describe the project code name change from Quantum to Neutron. Replace the Quantum references for Neutron in preface, install, use and config sections.

Change-Id: Ifff88769934bd22bd3bc7ddb87a16a64bda05b20
Merge "bug 1192994 Describe the project code name change from Quantum to Neutron. Replace the Quantum references for Neutron in preface, install, use and config sections."