Convert css files to sass and refactor code Seneca-CDOT#61

* It uses Gulp for processing Node Sass
* I've split the headings into partials, and call them in app.scss which is output to css/app.css
* You need to run `gulp sass` for it to compile

Dashboard/gulpfile.js

@@ -0,0 +1,16 @@
+'use strict';
+
+var gulp = require('gulp');
+var sass = require('gulp-sass');
+
+sass.compiler = require('node-sass');
+
+gulp.task('sass', function () {
+  return gulp.src('src/sass/**/*.scss')
+    .pipe(sass.sync().on('error', sass.logError))
+    .pipe(gulp.dest('src/css'));
+});
+
+gulp.task('sass:watch', function () {
+  gulp.watch('src/sass/**/*.scss', ['sass']);
+});