Update TR1 library to cope with GCC-4.3 in C++0x mode, and in TR1 mode.

Updated regex concepts to match the TR1.
Added "tricky" cmath_test to test for the functions Boost doesn't implement.

[SVN r48413]

include/boost/regex/v4/basic_regex.hpp

@@ -191,7 +191,7 @@ class basic_regex : public regbase
 {
 public:
    // typedefs:
-   typedef typename traits::size_type            traits_size_type;
+   typedef std::size_t                           traits_size_type;
    typedef typename traits::string_type          traits_string_type;
    typedef charT                                 char_type;
    typedef traits                                traits_type;