add .sass-cache folder to .gitignore
remove gulp-notify
add gulpfile.js
add gulp package to gulpfile.js
add directory for task to gulpfile.js
add task for compile sass files
add task for compile admin-lte.less
add task for compile bootstrap.less
add task for minify all javascript files
add task for minify all bootstrap javascript files
add task for minify all admin-lte javascript files
add task for bundling all css files
add task for bundling all js files
refactor gulpfile.js