[bug 949461] Hack spam delete link

This makes it easier to delete a batch of spam from the spam duplicates
report (ab)using the existing admin tools.
[bug 949461] Add delete link to response details page

This is quick'n'dirty. We should build better things later.
[bug 949461] Wrap links in superuser check

It can only be used by a superuser, so might as well wrap it in a check
and not confuse everyone else.
[bug 977124] Validate email field
[bug 991265] Update elasticutils, add elasticsearch-py
[bug 991265] Add urllib3
[bug 991265] Fix everything to work with elasticutils-py
Clean up .gitmodules
Tweak text on running tests with the right flags
[bug 991265] Update to elasticutils 0.9.1

* update to ElasticUtils 0.9.1
* fix the occurrences report facet use
Implement an hourly histogram

This shows total number of responses per hour for the last five days.
It's fast-and-dirty--we can spruce it up as we go along.
Fix date shenanigans on hourly_histogram
Remove incorrect "GMT" timezone label
added create virtualenv step and finding lessc path
Update CONTRIBUTORS
[bug 998199] Fixed Privacy policy and few link

The url for the privacy policy has changed from
http://www.mozilla.org/privacy-policy.html to
http://www.mozilla.org/privacy/websites/

We should update the /about/ page to reflect this.
Add www
Update to dennis v0.3.11
[bug 996918] Update to Django 1.5.6
Tweaks to hourly histogram

* allows you to specify the date-end
* fixes width and height so you can do comparison screenshots