Conformal Systems Support

Note that this is the last release that will use the xxxterm name.  The browser is being renamed xombrero (pronounced sombrero).

New features
* Add a TLD list in order to make whitelists work correctly with domains such as .co.uk
* Add option to require confirmation of downloads
* Add ability to control HTTP 'Referer'
* In hinting mode make same URLs have the same link number
* Add support for Strict-Transport-Security
* Add a pass-through mode so that the browser receives all keystrokes
* Add a "remove all" button on the cookiejar page
* Add initial support for Windows and OSX (experimental!)
* Tons of flyspray bugs squashed