Added vendor/ directory for Composer's installed files

vendor/alexgarrett/violin/examples/messages/custom_field_message.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ * Violin example. Custom field message.
+ * 
+ * Defining an error message for a particular field, when a
+ * particular rule fails.
+ */
+
+require '../vendor/autoload.php';
+
+use Violin\Violin;
+
+$v = new Violin;
+
+$v->addFieldMessage('username', 'required', 'We need a username to sign you up.');
+
+$v->validate([
+    'username'  => ['', 'required|alpha|min(3)|max(20)'],
+    'email'     => ['dale@codecourse.com', 'required|email'],
+    'password'  => ['ilovecats', 'required'],
+    'password_confirm' => ['ilovecats', 'required|matches(password)']
+]);
+
+if ($v->passes()) {
+    // Passed
+} else {
+    var_dump($v->errors()->all());
+}