twitter/bootstrap — pull request #8054 by ethaizone (2013-06-02 10:58:01+00:00)
Title: Edit composer for dev can custom install path

Due this faq. https://github.com/composer/composer/blob/master/doc/faqs/how-do-i-install-a-package-to-a-custom-path-for-my-framework.md

Add composer/installers in require scope so dev who require bootstrap can config path to this package to store.