add hybrid 8.1.12 RPL_WHOISMODES numeric
Modes; functions should be able to operate on our relevant objs

array_to_mode should be able to operate on an IRC::Mode::Single;
mode_to_array should be able to accept the IRC::Toolkit::ISupport objs for
param_always/param_set opts.

Still needs tests and probably docs.

	modified:   lib/IRC/Toolkit/Modes.pm