Why does Bower installation download the entire Bootstrap repo?

Created by: rwillrich

I have installed Bootstrap with Bower on an application I'm developing and the fact that Bower downloads the entire repository have surprised me, given that all production files are in 'dist' directory.

Initially I've thought that it was caused by Bower, or by the lack of some configuration of him. Then I research on Bower's documentation and notice that exists a 'ignore' property on bower.json that serves for this purpose.

Shouldn't we add the files other than the production ones to this property? Or am I missing some motivation beyond maintaining all files on Bower's Bootstrap package?