Since blockdiag seems a bit unmaintenained, let's just statically
generate the SVGs but let's keep the source files in tree so we can
modify the diagrams whenever we want, provided blockdiag exists in
a foreseenable future :-)
Closes-Bug: #2026345
Change-Id: I1cc078554ab149a9849c895e08c878180b7510b0
This change adds a simple sequence diagram showing the flow of a volume
attachment between the various services, using the libvirt driver as an
example virt driver.
Change-Id: I631ac9de3d48aa0ad849f6615d0ad2052cb63e80