admin-ui: Fix rendering bug

There was an invalid path of icon-fonts files and Firefox browser
couldn't show the icons that we 've used.
admin-ui: Fix bugs regarding arrow-buttons in tables

In some cases, the arrow button that is included in table rows was
not clickable. That was happening because the summary area was
expanding over the arrow.

With the addition of z-index property this problem fixed.

Also, in some cases, there was a shake when summary area was
expanding. This occurred from measuring the height of the span in
the arrow-button instead of the button's height.
admin-ui: Fix style bug

The table of IP history in details was getting out of the wrapper
in Firefox.
A horizontal scrollbar solves the problem.
admin-ui: Add generated css files
Merge branch 'release-0.16-admin-ui-fixes' of https://github.com/AthinaB/synnefo into release-0.16
snf_django: Handle invalid filter expression

Handle case of invalid expression in the '--filter-by' option of
management commands by raising a 'CommandError' with a descriptive
exception message.
cyclades: Fix snapshot status in 'volume' views

Map the internal status of the image in Plankton in the status that is
specified in the blockstorage API.
burnin: Provide tests for snapshots

Extend burnin testing suite to provide snapshots functionality.

Closes #265
burnin: Delete temporary containers

Use kamaki's 'del_container' function with "delimiter='/'" in order to
delete temporary containers and all their contents.
astakos: Enforce message template strings to unicode

enforce provider message templates to unicode prior to the template
string manipulation. Most of the template variables are expected to be
in unicode thus mixing non-unicode template strings with unicode variables
is prone to encoding/deconding erros while rendering the auth providers
message templates.
deploy: Add 'ssl-cert-snakeoil' to the CA bundle

Deploy uses the ssl-cert-snakeoil certificate when configures apache.
Add the above self signed certificate to the system's CA bundle so that
kamaki can use it to verify the connections.
cyclades: Add --public option image/snapshot cmds

Add '--public' option to 'image-list' and 'snapshot-list' management
commands. Also, fix stale help message of '--user' option.
Update Changelog
Add release dates for 0.16rc2
burnin: Extend snapshots tests

Provide tests for spawning a VM from a snapshot.