dchar unicode phobos

[Johan Granberg]

That D supports UTF is great, and by using dchar[] all Unicode code 
points can bee used. But phobos does not support dchar[]s adequately. 
(or wchar[]s for that matter) Wouldn't it bee expected of the language 
standard library to support all of the languages string encodings?

Proposal: add wchar[] and dchar[] versions of the string functions in phobos

(should this bee filed as a bug?)