I am trying to install properly Twitter Bootstrap in my current ember-cli project. I did install bootstrap with bower :
bower install --save bootstrap
plus ça change... I use ember-cli-bootstrap-sassy now, it seems to bring along minimum cruft while still letting me customize Bootstrap's variables.
You should probably use Johnny's solution above instead of the lib I originally mentioned. I also like ember-cli-bootstrap-sass, because I can customize Bootstrap's variables directly in my project.
If you're using a version of ember-cli that supports addons (0.35+, I believe), you can now use the ember-cli-bootstrap package. From the root of your app,
npm install --save-dev ember-cli-bootstrap
That's it!
Note: as @poweratom points out,
ember-cli-bootstrap
is somebody else's library which chooses to also include bootstrap-for-ember. Thus, this lib could get out of sync with official bootstrap version. However, I still find it a great way to get prototyping fast on a new project!