Switching to Gulp

I thought Barebones could be improved by moving away from the config.rb setup to utilize a task runner like Gulp.  Instead of the need for an app like Codekit for compiling, everything can be done on the fly in the command line.  Users can easily install the necessary node modules by cloning the project and (with Node and Gulp installed) doing an npm install.

I included processes to compiling all Sass, combine/minify all Javascript, optimize images, etc.