[boost] [spirit] trunk failures due to wrong namespaces

Hi ! I've stumbled across some spirit test failures like http://tinyurl.com/bwkgvu The obvious fix seems to be to adjust "boost::math" to "boost::spirit::math" in all places. The attached patch tries to do that. Okay to commit ? Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! Ingenieurgesellschaft für * voice: ++49 511 262926 57 ! Verkehrs- und Eisenbahnwesen mbH * fax : ++49 511 262926 99 ! Lister Straße 15 * juergen.hunold@ivembh.de ! www.ivembh.de * * Geschäftsführer: ! Sitz des Unternehmens: Hannover * Prof. Dr.-Ing. Thomas Siefer ! Amtsgericht Hannover, HRB 56965 * PD Dr.-Ing. Alfons Radtke !