Update Glup (and friends), along with Gulpfile.js and package.json

The package.json's dependencies were heavily out of date. Not to mention, that it was also missing a lot of basic information.

This commit brings the dependencies up-to-date and updates the package.json.

Author: ran-dall

Gulpfile.js

@@ -1,5 +1,5 @@
 var gulp = require('gulp');
-var sass = require('gulp-sass');
+var sass = require('gulp-sass')(require('sass'));
 var exec = require('gulp-exec');
 
 gulp.task('styles', function(done) {