add max-height to .grid-code
use ems instead of px
Merge branch 'get-started' of github.com:yui/pure-site into get-started
remove .content class from output tabs
make output tab views look nicer
Merge pull request #218 from tilomitra/get-started

[Get Started] Add max-height to CSS code.
Move Pure Starter Kit download button to right of output tabs