Adds `link` tag support

[joaomilho]

[joaomilho]

This PR is more of a question: Why don't we have link tag support already? I see lots of people asking how to have css inside the reactor debbuger. I can't think of a more natural way to do it than just having a link tag (I've tried in my project and it works fairly well). What am I missing?

[LeonLiuY]

I can't think of a more natural way to do it than just having a link tag (I've tried in my project and it works fairly well).

It is not perfect.

The link tag generated by this way is inside the body, which is a little different from the ones in head:

http://stackoverflow.com/questions/1642212/whats-the-difference-if-i-put-css-file-inside-head-or-body

[joaomilho]

Well, that's because Elm doesn't expect you to write your HTML container in it. Maybe the solution is not to avoid the link tag, but actually to add support for html, meta...

WDYT?

[LeonLiuY]

Well, I agree to make this library to support link, html, meta...

What I wanted to state is that I'm still asking a better solution of "how to have css inside the reactor debbuger".

[joaomilho]

well, is there any roadmap on Elm in general about that?