.jshintignore isn't being picked up.

[kitsunde]

I'm adding this here because I was looking into ember-cli/ember-cli#4586 to see how much work it would be. There's no way for the JSHint API to pickup .jshintignore files and it's intentional: jshint/jshint#2126

To solve it we would need to read the .jshintignore files and skip matching on our own in broccoli-jshint. There's a few issues with how JSHint picks up the .jshintignore files too, that should be bug-for-bug matched? https://github.com/jshint/jshint/issues?q=is%3Aissue+.jshintignore+is%3Aopen

[jfelchner]

Just ran into this. I'm not sure how this isn't a problem for everyone? I mean it's scanning files in bower_components and node_modules which I don't even care about. I don't see how this isn't drastically slowing down builds.