Fix Angular two way bindings

[mclaughlinconnor]

Adds support for the missing [(twowaybinding)] Angular syntax.

Adding special cases like this is not a good way of doing this. What happens when someone uses this project with a new web framework using {binding} syntax?

I've also just duplicated the regex with a tiny change. All of the regexes need to be standardised because there are too many special cases.

This is good enough until I figure out how I want to do this properly though