Run PHPUnit

- require phpunit v4.4 via composer
- add phpunit.xml (with exclusion of hanging test)
- add ext-mysql to composer require

Author: tmotyl

.gitignore

@@ -1,3 +1,4 @@
 .idea
 /magmi/state/*
 !/magmi/state/dummy.txt
+/vendor

composer.json

@@ -10,5 +10,11 @@
     ],
     "bin": [
         "magmi/cli/magmi.cli.php"
-    ]
+    ],
+    "require": {
+      "ext-mysql":"*"
+    },
+  "require-dev": {
+        "phpunit/phpunit": "^4.4.0"
+    }
 }