Faster TextTemplateParser [Chrome]

I was playing with RegEx so i tried to come up with a RegEx way of
handling the TextTemplate in Rivets. And (at least in Chrome) the
solution is nearly twice as fast.

You can find the perf test here: http://jsperf.com/parse-string-regex

It’s is quite astonishing how much better V8 can handle regular
expressions.

If other browser catch up with the RegEx performance this could be a better solution.