Can't install packages like materialize-css

[Frondor]

I've tried using bower as well but without success. Unlike the js file, css file is never showing when I do gulp browsersync, I might be doing everything wrong but I'm new and there's nothing about installing other packages using npm (your way) in the docs.
Also gulp isn't properly processing fonts, materialize-css have (ridiculously) two folders with fonts, but gulp does merge those folders and drop all the fonts in the same dist/font folder. This may not be a problem, but I want to figure out a proper way to implement said package using this generator.
Can someone give me a hand on this?