Add more Emmet flavors

[georgelemon]

Multiplication

With * operator we can define how many times x element should be outputted. The generator injects a $i variable containing the index value. This can be combined with an array storage. For example:

var x = ["tim", "is", "awesome"]
ul > li*3: $x[$i]

Expected output

<ul>
  <li>tim</li>
  <li>is</li>
  <li>awesome</li>
</ul>

to be edited