deploy: Remove version dependencies

Remove dependencies to specific versions of snf-image and blktap-utils.
Rename blktap-utils to blktap-archipelago-utils
Add release date for v0.16
Bump version to 0.16rc2
Fix indentation issues in Changelog
docs: Fix typos
docs: Add another way to view the Synnefo UI

Add instructions on how to connect to the Synnefo UI using a SOCKS
proxy.
deploy: Remove obsolete UI_MEDIA_URL setting

Deploy used to set UI_MEDIA_URL to point to the IP of the host
instead of its FQDN, to work around issues with the Java-based VNC
client and self-signed certificates. Synnefo v0.16 has obsoleted
the Java VNC console, so we may safely remove this setting.
Fix burnin bug: Index error in pithos account_get

Bug description: pithos test assumed there are always some extra
containers in the tested pithos account and checked for their
existence, causing an Index error to be raised when starting the
test with an empty account.

Solution: Do not check for containers outside the ones created
specifically for the test.
cyclades: Fix type error

together with some PEP8 issues.
cyclades: Fix snapshots of attached volumes

Fix major bug when taking snapshots of non-root volumes. The custom
'SnapshotInstance' method of 'GanetiRAPIClient' always took a snapshot
of the root volume (index=0) of an instance, ignoring the volume that
the user requested. This resulted in always taking a snapshot of the
root volume which in many cases did not fail.
cyclades: Invalidate snapshots when job fails

Make Cyclades invalidate snapshots in case of failure to submit the job
to Ganeti, or when the job fails. In either case invalidation is
performed by marking...
TODO: Add states sto API

fixes grnet/synnefo#231
pithos: Fix bug when copying mapfiles

All volume mapfiles stored from Archipelago contain hexlified
objects so after copying or moving a Pithos object representing
a volume the new stored mapfile should contain the same
hexlified objects.