Allow browserify transforms after typescript compilation

[Sambego]

I'm currently trying to build an app in which I need generator functions. Typescript can only handle them when compiling to es6, not when compiling to es5. It would be cool if I could compile the typescript to es6 (which is possible at the moment), and after that compile it to es6 withe babelify or do some other transforms on it.

Currently you can add browserify options. When specifying a transform here, it will also get executed before the typescript compilation.

[scic]

I would also welcome the option to execute stream transforms after the tsify plugin runs.
I plan to used it for gulp-inline-ng2-template which inlines templates for speedup.

See:
https://github.com/ludohenin/gulp-inline-ng2-template#browserify-transform-example