* split plugin into several files
* removed static functions and properties (except for uninstall, of course)
* introduced filters `im8qw_default_admin_language` and `im8qw_use_default_admin_language` in order to customize or deactivate the default admin language
* code reformat
* compatible up to WooCommerce 2.1.6

git-svn-id: https://plugins.svn.wordpress.org/im8-qtranslate-woocommerce/trunk@888323 b8457f37-d9ea-0310-8a92-e5e31aec5664