Css medic

Retina CSS MODX Help Logo
Primary Action styling on sign up button
Un-uglifying the required/invalid input state (now uses red border and
font awesome icon)
Adjusting x-panel table header hue (to $darkNeutral)
removing legacy green buttons in package manager (now $primary)
retina-tizing x-btn-split (Download Extras button)
uberbar result hovers (%nav-item)

![screen shot 2013-11-01 at 3 26 34 am](https://f.cloud.github.com/assets/592335/1451514/1c75721e-429d-11e3-9981-7ea24da6f241.png)