BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS to config.hpp.

Removed unused BOOST_EXPLICIT_TARGET macro.
Moved boost::detail::type to boost/type.hpp.
Made it compile with stock gcc again


[SVN r8663]

libs/conversion

@@ -1 +1 @@
-Subproject commit ed636dd3627695f2cb6b2147d138cc757084188a
+Subproject commit e923c638b485f2db1b80f78a463f6df76751e0ba