1) Added natives to create and manipulate global and private forward
2) Added natives to call forwards and functions
3) Added an IChanageableForward::RemoveFunction overload for convenience or something
4) Added test suite plugins for functions and forwards
5) Some random touch-ups to some include files
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40627
removed ICallable::GetAddressOfPushedParam
removed phys_addr from ICallable::PushArray
fixed a bug where sp_context_t::n_idx was overwritten upon re-entrant calls
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40595
ThrowNativeErrorEx now returns 0 for convenience
PushCellByRef and PushFloatByRef no longer have a flags parameter because it was almost pointless
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40590