I\'m recently playing with bootsrap3. I compiled it from sources and included distr js and css to my project. The thing is, I see in GH dev tools, that it\'s trying to get .
I had also warnings in Google Dev-Tools and I added only bootstrap.min.css.map file in the same folder, where bootstrap.min.css is.
I have now no warnings more and You can find more Explanation here: https://github.com/twbs/bootstrap#whats-included
I hope, I answered your Question.