s/wx.Color/wx.Colour/g
Update header.html
Minor Jonah and Sugarcane fixes.

* Added missing String.unDash() function used by
Wikifier.formatHelpers.inlineCssHelper
* Altered the "macro" formatter lookahead regex so that single
greater-than signs are permitted inside macros. (Double greater-than
signs still terminate).
* Added <noscript> messages to alert the reader that Javascript is off.
* Removed Furl link from Sugarcane.