Highlighting parentheses

[k-k]

I tried taking a stab at adding this in the php.cson file - but didn't get far.

Things like if(true) or case($foo), or native functions in_array() - the parentheses are not wrapped in a span with a class(es), meaning we can't target them in syntax themes.

Example from the dom on an if statement checking a file_exists: source

Can this be added? I'll keep digging through the language file in the meantime.

[winstliu]

Progress. Just need to fix/add specs and then I'll submit a PR. (Red highlighting added for emphasis)

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