Changes from WebPagetest 2.11:

Web Server

Added support for reporting user timing marks.
Added an optimization check to see if JPEGs were progressive or not.
Added detailed JPEG info to the page images UI.
Added support for turning arbitrary videos into comparison results pages.
Updated the embedded Chrome timeline viewer so new features like the frames UI are available.

Added support for reporting DOM Element count and if the viewport is fixed.
Significant improvements to the IE support (navigation timing, crash fixes).
Console logs from Chrome are now only available when timeline capture is enabled.
Added support for ignoring SSL certificate errors for IE and Firefox (Chrome already had it).
Improved the quality of screen shots and video when the browser viewport is small.
Tweaks to the end state detection to allow for measuring an ajax event after a page load (where no document navigation happens).
Fixed issues with Firefox 22+ SSL capture.
Fixed video capture for Chrome 28+ where it was displaying a ruler grid instead of a blank page.
Fixed support for capturing video when Chrome is using GPU acceleration.
Fixed double-counting of bytes for encrypted requests.
Fixed reporting of navigation errors (IE).

Added support for reporting user timing marks.
Added an optimization check to see if JPEGs were progressive or not.
Added support for expiring cache entries that are going to expire within X seconds (expireCache script command). Only supports IE right now.
Added support for regex filtering in the setHeader command (had only been implemented for the addHeader command).