Normalize and special scalar handling

Hello group,
is there any special reason for the special handling of scalar
arguments in the normalization classes? Would it not be simpler
to just use asarray and only use arrays?
If nothing speaks against it, i could do a pull request.

greetings
Till Stensitzki

If nothing speaks against it, i could do a pull request.

If you are willing, I would encourage you to do that, or at least make a branch in your matplotlib fork and post the diff URL here. That way we can discuss the pros & cons in-line, even if it means that we do no actually merge the PR (that sounds bad, but really pull requests are a great medium for discussing code).

Thanks!

Phil