[WIP] Add class and tag faces

[minikN]

Hello, I've added two new faces: web-mode-css-selector-class-face and web-mode-css-selector-tag-face.

I'd like to enhance web-mode's css highlighting abilities, eventually being able to highlight syntax like so:

At the moment I just added the ability to differenciate between class selectors (.myclass { ...}) and tag selectors (div {...}).

Ideally I would add some more rules, and I'm sure what I already added could be improved, it's not perfect yet but a proof of concept. Before continuing working on this however, I'd like to know if a change like this is welcomed and whether or not I should keep going with this.

Cheers.

[black7375]

LGTM :smile:

[minikN]

What does @fxbois think?

[fxbois]

@minikN good idea

[fxbois]

thx