Bootstrap v4.0.0-alpha.3 for Ember application

I'm trying to update my Bootstrap dependency in my Ember application to the alpha 4 version so I can access the utility classes (such as margin/padding).

I think Bootstrap is a bower dependency since it's listed in bower.json, so I followed the instructions from the new Bootstrap website:

bower install bootstrap#v4.0.0-alpha.3

When I did this, bower.json didn't update. In fact, Bootstrap version is still "bootstrap": "^3.3.7".

The only differences are:

1. Now I have 152 JSHint errors in my terminal...I tried adding "bootstrap":true to .jshintrc and restarted my server but the errors were still there.
2. My ember app was broken until I removed line 1 in change-version.js, which was #!/usr/bin/env node.
3. When I start typing a new css style in my templates, the CSS styles are showing up, but my Ember application is not recognizing them. For example, here is an image:

When I add the class m-r-3 and reload localhost, nothing shows up.

I've already tried importing bootstrap.min.css and bootstrap.css in the ember-cli-build.js file. It didn't work.

I have already read through this page which goes over dependencies but I have had no luck. If anyone could assist here that would be greatly appreciated.