Added 'cinder quota-delete' command

This patch adds documentation for the 'cinder quota-delete' command.

Partially implements: https://blueprints.launchpad.net/cinder/+spec/quota-delete

Change-Id: Id27b70c2e4171a8063b00d8e946250c29736dde5
Add hw_vif_model and hw_disk_bus to glance properties

Document hw_vif_model (for both libvirt and VMware) and hw_disk_bus
(libvirt) based on information in nova repository files
nova/virt/libvirt/vif.py and nova/virt/libvirt/vif.py.

Change-Id: Ib22c8192a60b35fb1bb8c755c4d9bff9c72456f7
Closes-Bug: #1314738
Fixes vSphere Documentation link for creating tags

Change-Id: Id5df86e4cd163146d16e43cb1c1158112ca0d9a6
Closes-bug: 1316923
Merge "Fixes vSphere Documentation link for creating tags"
Merge "Add hw_vif_model and hw_disk_bus to glance properties"
Merge "Added 'cinder quota-delete' command"
Imported Translations from Transifex

Change-Id: I7f56ac03a9601bb4e69002d36efd90b8e548d3a9