Adding gulp-filter and using it on less files that way (excluding mixins and variables files) enable a developer to add custom less to the less folder and be sure that they will be transformed to css by gulp.

Sometimes minify-css can run before less since they are parallel tasks
Make minify-css wait for the completion of less so the freelancer.min.css file is always generated.
Otherwise gulp needs to be run twice to ensure an updated *.min.css file

removed dependency on Bootswatch flatly theme and repalced it wtih custom code, added a vendor directory so third party plugins are now separate from theme files