Partially revert polyfill changes
Partially revert polyfill changes

It turns out IE10 doesn't have the URL constructor and somehow I
misinterpreted the MDN docs.

The bind polyfill still isn't needed, except by PhantomJS.

It also seems silly not to just include wgxpath without npm. Save
the browserify-ing step.

project-star/browser-extension,hypothesis/browser-extension,project-star/browser-extension,hypothesis/browser-extension,hypothesis/browser-extension,project-star/browser-extension,hypothesis/browser-extension