gulpfile.js: Changing the source matching rules to include the processing of all sass under the sass folder, regardless of depth of subdirectories. Altering the style task so that it ouptuts minified and unminified css into two seperate folders.
style.css: changing the path of the @include so that it points to the updated location of master.min.css

Changing the naming convention of sass files to include the '_filename.scss' syntax, which tells sass to process it as a partial file, and tell sass not to preprocess it.