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;

.gitignore

@@ -1,3 +1,15 @@
-.DS_Store
+# General
+# -----------------
+
+# Logs
+logs
+*.log
+error_log
+
+# Package Managers
+# -----------------
+
+composer.phar
+vendor/
 node_modules/
-npm-debug.log
+bower_components/