Prevent ember-cli watcher being assigned to node_modules

[jasonmit]

Fixes #61

Also went ahead and removed the addon folder since the presence of it causes warnings in the parent project:

DEPRECATION: Addon files were detected in `/Users/jasonmit/projects/foo/node_modules/ember-cli-node-modules-to-vendor/addon`, but no JavaScript preprocessors were found for `ember-cli-node-modules-to-vendor`. Please make sure to add a preprocessor (most likely `ember-cli-babel`) to in `dependencies` (NOT `devDependencies`) in `ember-cli-node-modules-to-vendor`'s `package.json`.

[kellyselden]

Mind removing the yarn file, then we will get this merged.

[jasonmit]

@kellyselden done

[kellyselden]

Thank you!

[kellyselden]

Released in v0.2.2

[stefanpenner]

I would prefer sane be fixed, then going around patching all libraries to not-watch. Fixing sane will have much better impact.

I spike a WIP in Jan, just haven't had much time to make it not mega shitty: amasad/sane#83

But it more or less completely addresses slow startup times do to excessive watch-roots.