Use correct names for meta querying

Fixes #94, props @kosso

Author: rmccue

client.php

@@ -14,12 +14,12 @@ function rest_get_client( $type, $key ) {
 		'post_status' => 'any',
 		'meta_query' => array(
 			array(
-				'meta_key' => 'key',
-				'meta_value' => $key,
+				'key' => 'key',
+				'value' => $key,
 			),
 			array(
-				'meta_key' => 'type',
-				'meta_value' => $type,
+				'key' => 'type',
+				'value' => $type,
 			),
 		),
 	) );