Require Prism as a dependency in the other languages

[XVincentX]

Actually, Prism languages definition are just assuming that Prism is already loaded. This does not let me load language components on demand in a modular way.

[Golmote]

True.

[XVincentX]

@Golmote Cool, can we do something for that?

[mAAdhaTTah]

Related: #456

[Golmote]

Oh thanks! I was looking for this issue and couldn't find it.

@XVincentX Yes, we can do something about that, but it's not a small change. See #456 (comment).
I'd love to see Prism going asynchronous but this will require quite some work!

[apfelbox]

UMD would be really nice, but that would be quite a massive rewrite with touching nearly every file in the repository.

[mAAdhaTTah]

@Golmote Yeah, I have it bookmarked because I'd like to tackle it at some point, but I haven't had the time nor the approach yet. @apfelbox is probably right, that asynchronously loading Prism's languages would probably be a major undertaking.

[breezewish]

+1 for this feature. in fact you only need to add something like var prism = require('./prism-core.js') in each file

[mAAdhaTTah]

This should be resolved as part of #1359.