Delay main class initialisation so plugins can use the provided hooks

Currently the plugin initialises outside of any hook, so any plugins (or even more tragically: themes) that load after this plugin can not use most of the plugins hooks, because by the time the code execution reaches these plugins/themes, WPSL hooks have already been fired. Just try to add this code anywhere outside the WPSL plugin and set a breakpoint in it. The breakpoint will never be reached.

add_filter( 'wpsl_store_meta', 'dgz_wpsl_store_meta', 10, 2 );
function dgz_wpsl_store_meta( $store_meta, $pid ) {
   return $store_meta;
}
add_filter('wpsl_frontend_meta_fields', 'dgz_wpsl_frontend_meta_fields' );
function dgz_wpsl_frontend_meta_fields($store_fields){
   return $store_fields;
}

Suggested solution:

Inside wp-store-locator.php initialise the main WPSL class inside a hook like this:

add_action('plugins_loaded', function(){
   $GLOBALS['wpsl'] = new WP_Store_locator();
});

This way WPSL will retain full functionality, but the delayed initialisation will allow other plugins to use the hooks provided.

Thank you for your consideration.