Right now, `package.json` references this `prism.js`.  If you think it would be better-off referencing something else, then I'm happy to change it.

My reasoning was that if it just referenced `prism-core.js` then it wouldn't appear pre-loaded with various languages.  

Separate JS files don't share a global namespace in Node, so adding the ability to load these languages individually would require more (possibly awkward) code-changes.  The simplest thing seemed to be to reference what looked like a grand-bundle of stuff.