Update 3.1

- Theme Update Notifier modified
- Added filter to modify logo image attributes
- Added custom action hook for stylesheet regeneration
- Renamed wm_minimize_css() function to wm_minify_css()
- Skinning System update
- Fixed WooCommerce colors removing error
- Adding wm_get_stylesheet_directory() function
- [gallery] shortcode modification disabled by default
- [caption] shortcode modification removed