Bug 588237, patch 2:  Fix comment that is now incorrect due to work in bug 563584 or followups.  r=roc
Bug 588237, patch 3:  Remove the pushed floats list when it is empty.  r=roc
Bug 588237, patch 4:  Pull pushed floats back from the next-in-flow at the start of reflow.  r=roc
Bug 588237, patch 5:  remove the optimization of skipping FlowAndPlaceFloat for some pushed floats, simply because the optimization looks fishy to me.  r=roc
Bug 827698:  Use the length of the 'animation-name' list when determining how many animations to run.  r=bzbarsky

NOTE:  The tests in test_animations.html fail without the patch; the
tests in test_shorthand_property_getters.html are only tangentially
related and pass both with and without the patch.
Bug 827717:  Change record of CSS animation start to be before delay so that dynamic changes to animation-delay are honored.  r=bzbarsky

This matches the CSS Working Group consensus recorded in
http://lists.w3.org/Archives/Public/www-style/2012Nov/0261.html , though
the spec hasn't yet been updated.
Bug 827687:  Fix edge case in calculation of whichIteration.  r=bzbarsky
Bug 827687, patch 2:  Be more careful walking segments.  r=bzbarsky