A small update was released tonight for Counter-Strike: Global Offensive. It's fairly minor in the grand scheme of things.

Changelog for CS:GO update for November 21, 2013

MISC
- Added the Highlights feature. Players can view their own highlights from downloaded matches by selecting ‘Watch Your Highlights’ when clicking on a match. Other players’ highlights can be accessed through the match scoreboard.

COMMUNITY
- Graphs are now accessible when sv_competitive_official_5v5 is set to 1
- Removed player number restriction from Spectator Stat chart.