Improve display of instance image information

When instance is booted from volume image it returns a string,
while for instance from image returns a dict. Fix is made to
handle both cases.

Change-Id: I23aeccd21f88a353222d3fc7dc4b5c337c2bfecb
Closes-Bug: #1239896
Don't access the net while building docs
(Note this hasn't been submitted upstream)
disable debug, move web root
change lockfile location to '/tmp' and also add localhost to ALLOWED_HOSTS
Add a customization module based on RHOS

Change-Id: I8622ffc8e31cf553315077070b2a696de1bd5081

Conflicts:
	openstack_dashboard/settings.py
Revert "Use oslo.sphinx and remove local copy of doc theme"

This reverts commit b6f7d8318bf909cc9989809127fc108e405fa400.
move RBAC policy files and checks to /etc/openstack-dashboard
move SECRET_KEY secret_key_store to /tmp
fix up issues with customization
do not truncate the logo (related rhbz 877138)
move SECRET_KEYSTORE to '/var/lib/openstack-dashboard'