update jQuery
uppercased HTML tags -> lowercased
remove unneeded CSS vendor prefixes
remove IE  <= 7 star hacks
Initial removal of MixPanel and Gaug.es
Fixing the tracking key missing error
Merge pull request #1775 from gittip/merge-analytics

Remove MixPanel and Gauges
Merge pull request #1767 from seanlinsley/cleanup/assets

Assets cleanup