Support for favicons and iOS app icons and OS X pinned tabs.

[cycomachead]

OMG....the icon spec formats are getting ridiculous! :O

We have a favicon but we don't have app icons nor do we have a pinned tab icon (which is simple to do)

• iOS app icons (this should be a Snap! logo, probably in the yellow + blue coloring)
• favicon is good! (and frankly, I like my design. :))
• Pinned tab icon should be a yellow lambda.
• Android support for icons

Links:

• Android: https://developer.chrome.com/multidevice/android/installtohomescreen
• Apple: https://developer.apple.com/library/mac/documentation/AppleApplications/Reference/SafariWebContent/ConfiguringWebApplications/ConfiguringWebApplications.html
• Helpful Gist: https://gist.github.com/tfausak/2222823
  OMG SO MANY SIZES!