beginnings of a decent parser for type constraint strings
parser+registry working now
restore Type::Registry (and now Type::Parser) to lib and t

--HG--
rename : devel.experimentation/lib/Type/Parser.pm => lib/Type/Parser.pm
rename : devel.experimentation/lib/Type/Registry.pm => lib/Type/Registry.pm
rename : devel.experimentation/t/registry.t => t/registry.t