md-button fab with ng-href change icon position

[luclanet]

First with "ng-href", second one without.

[marcysutton]

That means anchors and buttons inside of md-button have slightly different styles...ng-href creates an child <a> element instead of <button>. Should be an easy fix, want to create a PR?

[luclanet]

What's a PR?

[ruiaraujo]

@luclanet pull request, ie, fix it. ;)

[iainmcgin]

I've been playing with this in codepen (http://codepen.io/iainmcgin/pen/wBjqyB), I have a proposed fix using absolute positioning for the icon within fabs, but it's kind of ugly and I hope someone finds a better way. Will create a pull request and let everyone discuss it there.

[iainmcgin]

The fix from @ruiaraujo looks good, and is included in my codepen for comparison.