[css-animations] Remove issue proposing alternative syntax for times in animation shorthand, which is no longer practical at this point.
[css-animations] Change ordering requirements for parsing keywords within the animation shorthand to prioritize animation-name lowest, and also require nonambiguous serialization with allowance for being non-minimal (which we could perhaps tighten later).

Fixes:
http://lists.w3.org/Archives/Public/www-style/2014Jan/0325.html
http://lists.w3.org/Archives/Public/www-style/2011Apr/0344.html