3.0.4 - 'app' folder

Created HTML, CSS and Javascript folders and files
3.0.6 - gulpfile.js - app directory

Set up an ‘app_directory’ variable to use in gulpfile.js
Merge branch 'Chapter-3'
4.0.1 - gulp-sass

Installed gulp-sass
4.0.2 - gulp-autoprefixer

Installed gulp-autoprefixer
4.0.3 - gulp-concat

Installed gulp-concat
4.0.4 - gulp-uglify

Installed gulp-uglify
4.0.6 - gulp-minify-html

Installed gulp-minify-html
4.0.7 - gulp-clean

Installed - gulp-clean
4.0.8 - gulp-changed

Installed - gulp-changed
4.0.9 - gulp-if

Installed - gulp-if
4.1.0 - browser-sync

Installed - browser-sync
Merge branch 'Chapter-4'