thread_management: a minor addition to the test, check for proper exception in case
the platform does not support binding.
piranha.hpp: add a clarification link and the OSX todo list.
pyranha: enable interoperability with coefficient types, if they are not
among the interop types already.
pyranha: remove stale code.
piranha.hpp: forgot anoter osx todo item.
pyranha: make the exposition of substitution functions more granular.

E.g., subs for polys was not exposed previously.
pyranha: add temporary workaround for a type_traits problem in libc++.
Merge branch 'master' of gitorious.org:piranhapp0x/mainline
More bits of support for OS X, including some cxxflags changes and a change in the suffix
of the pyranha module.