[boost] [1.33.0 RC1] libs/type_traits/docs/html needs boostbook.css

The html tables created by the Jamfile.v2 and type_traits.qbk in parent directory have no delimiters between columns and rows without a boostbook.css in the html directory. A copy of the boostbook.css from: libs/python/doc/tutorial/doc/html seems to work.