use @.suggestions.join instead of nqp::join.
add a token typo_typename and use it in "my" declarations.
throw the sorry anyway, since we did match a longname.
suggest names for --> Unknown, too.
suggest Types, too for Undeclared::Symbols.
throw a sorry instead of an exception, remove old error.
Merge pull request #100 from timo/typename_suggestions

Typename suggestions: in signatures, declarations, return types, ...