Extension point: postProcess

[gcao]

a = ['div', {postProcess: function(arr){}}, 'content']; a = ['div', 'content'] a.postProcess = [function(arr){}]

After process(), postProcess is called. This enables modifying the result before it is rendered.

Multiple postProcess can be supported like ['div', {postProcess: [doThis, doThat]}, 'content']