Allow height/width in images in user markdown/HTML

[JasonBarnabe]

No description provided.

[cletusc]

According to Daring Fireball:

As of this writing, Markdown has no syntax for specifying the dimensions of an image; if this is important to you, you can simply use regular HTML tags.

Looking around a bit, it looks like there are only a few markdown implementations that support a height/width within the markdown syntax for images, but they aren't standard across the board. IMO just support the height and width attributes of the img element, but force a max-height and max-width in the site CSS to prevent overflow.

I am -1 on height/width in markdown syntax images as it isn't standard.
I am +1 on height/width in HTML.

Markdown supports HTML within Markdown, so it shouldn't be too much of an issue for an author to use both if they absolutely need to.

Edit: ninja commit! Looks like you got it. :P

[JasonBarnabe]

After Markdown gets converted to HTML, it's passed through the same HTML filter as if you wrote HTML in the first place. I just added height/width on img to the whitelist, so if you can get Markdown to do height/width, now it'll be retained.