Added 'load-grunt-config' plugin

The plugin replaces the custom 'loadConfig()' function with a more robust and extensible solution.

It handles 'grunt.initConfig()' and 'load-grunt-tasks'.

Changes:
- Moved Grunt task configurations into a 'config/' sub-directory to allow room for custom plugins, modules, and tasks to be defined without being included by the config-loader;
- Updated '.eslintrc' to better lint module-based JS;
- Updated EditorConfig recommendations;

build/grunt/config/cssmin.js

@@ -0,0 +1,13 @@
+module.exports = {
+	options: {},
+	prod: {
+		files: [
+			{
+				expand : true,
+				cwd    : '<%= paths.css.dist %>',
+				src    : [ '**/*.css', '!**/*.min.css' ],
+				dest   : '<%= paths.css.dist %>'
+			}
+		]
+	}
+};