Add some C++11 keywords to syntax highlighter.

Quickbook's highlight includes the alternative operator representations (`and`,
and_eq` etc.). They should possibly be added as well.

svn path=/trunk/tools/boostbook/; revision=84553
Normalise space in section class.

Cleans up the output a tad bit when there's no role.

svn path=/trunk/tools/boostbook/; revision=84554