footer.php: using get_template_directory_uri() because it is the proper way to include the js file with a child theme
gulpfile.js: fixing livereload port error caused by duplicate tiny-lr; making a watch task, and setting the default task
casi_custom.js: testing the theme js file for functionality.
master.scss: including a class for hiding elements but keeping them accessable
style.css: adding an @import to ensure that the style.css includes the master minified css file
jquery: adding jquery library to the theme.