Perform Gulp automated tasks

- Please install gulp and the required plugins prior to execute the script:

`$ npm install gulp gulp-unzip gulp-zip gulp-rename gulp-clean gulp-flatten --save-dev`

- The Zip file from Ico Moon is also included in this commit

- Output zip file `alloy-font-awesome-1.0.0.zip` will be saved in the folder named `Portal ZIP file`

**Gulp will perform the following tasks:**

  1. Copy `style.css` from the ZIP file.
  2. Rename and move `style.css` to `scss/_icons-alloy.scss`.
  3. Copy the `fonts` folder, from the ZIP file, to the `alloy-font-awesome` repo root folder.
  4. Create a new Portal ZIP file named `alloy-font-awesome-1.0.0.zip`. (We'll figure out the version later.)
  5. From the repo's root folder, copy the folders `css`, `font`, `less`, `scss`, into the new Portal ZIP file, under the folder `alloy-font-awesome`.