Add prove.php with unit test documentation

Author: ornicar

README.markdown

@@ -45,4 +45,10 @@ Get the current branch:
 Know if the repo has a given branch:
 
     $hasBranch = $repo->hasBranch('master');
-    // returns true
+    // returns true
+
+## Run test suite
+
+All code is fully unit tested. To run tests on your server, from a CLI, run
+
+    php /path/to/php-git-repo/prove.php

prove.php

@@ -0,0 +1,9 @@
+<?php
+
+error_reporting(E_ALL);
+require_once(dirname(__FILE__).'/test/vendor/lime.php');
+
+$h = new lime_harness();
+$h->base_dir = realpath(dirname(__FILE__).'/test');
+$h->register(glob(dirname(__FILE__).'/test/*Test.php'));
+exit($h->run() ? 0 : 1);