Accept header parsing fixes. Now return first acceptable match rather than last. If not acceptable match in accept, 406 error returns list of acceptable types as text string. application/xml is listed in acceptable types only if dicttoxml is installed. Handle q > 1.0 by demoting q factor to 0.0001 making it unusable. Test cases for all this code. XML is commented out as we don't install dicttoxml.py.

//
// Layouts
// --------------------------------------------------


// Container (centered, fixed-width layouts)
.container {
  .container-fixed();
}

// Fluid layouts (left aligned, with sidebar, min- & max-width content)
.container-fluid {
  padding-right: @gridGutterWidth;
  padding-left: @gridGutterWidth;
  .clearfix();
}