Replaced --save-dev by --save in docs
Replaced --save-dev by --save in docs

amercier/esviz,amercier/node-es6-mixin,amercier/broccoli-file-size,amercier/esviz,amercier/karma-scss-preprocessor,amercier/chai-autoload-plugins,amercier/npm-package-skeleton,amercier/broccoli-sass-tree