Merge remote-tracking branch 'upstream/develop' into develop
[gh-586] Purge Varnish when a Webform component is updated
[gh-586] Use a session var to limit varnish flush calls on webform save
[gh-586] Alter cea1198 to use a static var rather than $_SESSION
[gh-586] No need to mess with time() if not using $_SESSION
Merge pull request #595 from erasmussen2/issue-586

Closes #586