Update index.html pages for Debian Install Guide

Sort entries, add Debian Install Guide

Change-Id: I7caeac1b9522d49952e64f9fa5345b75991b51f0
Install Guide: Fix service names for Ubuntu and openSUSE

For Ubuntu:
openvswitch->openvswitch-switch
neutron-openvswitch-agent->neutron-plugin-openvswitch-agent
For openSUSE:
neutron-openvswitch-agent->openstack-neutron-openvswitch-agent

Change-Id: I8fa175b9a666a41818c1fc590fc34a9afbb91e32
backport: havana
Closes-Bug: 1246021
Merge "Install Guide: Fix service names for Ubuntu and openSUSE"
Merge "Update index.html pages for Debian Install Guide"