ce4e860a introduced CSS `.alert{display:none;}` because alerts are
always included in `/signup/` and shown by JS. Use a new `.alert-hidden`
class for this purpose to avoid breaking other pages.
(imported from commit 199ba35dd3356bd4093aac2a54181331b3993ee8)
Constrain the meat of the page to the center 1440px or so.
This is achieved in a slightly more hackish way than I'd like,
but I think it's mostly necessary if you want the long color
bars that extend beyond that main area.
(I encourage you to view this diff with -w)
(imported from commit 10bf4462411146090b0147218d51cc444c3c91a2)
Windows, Mac, iPhone, Browser icons from http://www.endlessicons.com/ and modified
Macbook Air image from http://psdsonar.com/macbook-air-free-psd/ and modified
Linux icon from Wikimedia Commons and modified
Android icon from Wikimedia Commons and modified
(imported from commit 3cf8617cf49a833b706a2ff78b986e28c21e26cc)
Kevin Mehall
Zev Benjamin
Waseem Daher