CommonJS support

[Josh Beckwith]

The way exports are defined in PxLoader are incompatible with CommonJS. The PxLoader script becomes un-scoped from the window, so exporting to this is useless.

CommonJS support can be added with this line:
if(module && module.exports) module.exports = PxLoader;

[Andreas Heiberg]

Glorious man! Thanks!

[Andreas Heiberg]

#45

[paul@gh]

As pointed out by @aureliePrd there is an error where "module is not defined". (613791e#commitcomment-14711450)

I think it should use the following syntax

if (typeof module !== 'undefined' && module.exports)

[daviestar]

Can you please release a tagged version including CommonJS support. Thanks.