Use new render_instance_selector helper
Do not expose service user and passwords in UI

End users don't need to change this (and we already generate a random
password); it can still be changed in the json if really needed.
Merge pull request #39 from dirkmueller/release/pebbles/master

Fix merge typo: Its Cinder volumes, not Nova Volumes
Merge pull request #32 from vuntz/render_instance_selector

Use new render_instance_selector helper and do not show service-related bits in UI
Initial EMC/NetApp support