Meteor should ignore node_modules directory in the root of the project

[mitar]

Many development tools come as a NPM packages (like linting, testing, etc.) and they install dependencies into node_modules directory. It would be very useful if Meteor would not try to compile files inside it and would simply ignore the node_modules directory.

[ekatek]

Cool. As long as this is clear that the directory is, really, completely, entirely ignored, and there is documentation for this, it sounds pretty good to me. Pull requests encouraged -- should not be a very complex change. Thanks!

[mitar]

I was looking around, but didn't find the simplest way to do that. Where is code which ignores tests directory?

[mitar]

Done: #4457

[glasser]

Thanks, merged!