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;

.editorconfig

@@ -10,9 +10,6 @@ end_of_line = lf
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[*.json,.bowerrc]
-insert_final_newline = false
-
-[{.htaccess,.bowerrc,bower.json,package.json,component.json}]
+[{*.md,.*rc,.*.json,*.yml,.editorconfig,.env,.env.*,.git*,.htaccess,.jshintignore,bower.json,composer.json,package.json}]
 indent_style = space
 indent_size = 2