Large bundle size #94

Hey guys,

Currently, the ow bundle weighs in at 119.31 kb (65.69 kb minified), which imho seems pretty excessive considering it's functionality.

This isn't as much of an issue for Node.js usage, but for modules which want to support both Node.js and browser usage, I think it's a serious blocker to adoption.

I'm not that familiar with the TypeScript compiler, but I wanted to start the discussion to see if there is any low-hanging fruit we could cut out to make it more attractive to browser targets.

BTW, this concern originated in this comment by a popular JS frontend coder.