Adds NPM GULP and SASS to this project

[lotusgraham]

Installed npm, Gulp, and Sass in this project.

Adds a sass folder to the frontend directory. The current style.scss file within that folder compiles to style.css.. That css file is only there to veryify that it works with gulp and sass, it's not actually being used in the project currently. The index.css is still the production stylesheet.

I copied the styles in frontend/css/index.css and compiled them into SCSS code, which is what's being used to test the setup in frontend/sass/styles.css

Docs for others to utilize this setup is coming in another PR.

[lotusgraham]

I tested the compiled stylesheet which is currently frontend/css/style.css and all the styles look same as the index.css file.

[alexlemann]

refs #368