[minor] try import over require.resolve if location is not found. Thi…

…s allows better re-use of assets that are installed through the npm/node_modules folders

lib/square.js

@@ -1326,6 +1326,13 @@ Square.prototype.directive = function directive(data, extension, reference, seen
     var location = path.resolve(reference, file)
       , data = '';
 
+    //
+    // If it's not an absolute path, try to require.resolve the file.
+    //
+    if (!fs.existsSync(location)) try {
+      location = require.resolve(file);
+    } catch (e) { }
+
     if (!fs.existsSync(location)) {
       return self.critical(
           '// [square] @%s statement %s in %s does not exist'