Namespace organization

[pravdomil]

Hi, I have been playing with Elm Package Browser for a while especially the "group by module" view.

I would really help if modules will have a certain prefix to help categorise them.
For example there are many No* modules (eg. NoIndirectInternal, NoInvalidRGBValues, NoLeftPizza), which do not have any prefix, so they are hard to categorise.

For example String prefix works well:

What do you think?

jfmengels/elm-review#98