Add support for auto-completion when using the container thanks to th…

…e latest PhpStorm beta

See https://confluence.jetbrains.com/display/PhpStorm/PhpStorm+Advanced+Metadata

For example:

```
$logger = StaticContainer::get('Psr\Log\LoggerInterface');
$logger->
```

The autocompletion would work based on the argument passed to `StaticContainer::get()`.
(cherry picked from commit 92960ac)

.phpstorm.meta.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace PHPSTORM_META
+{
+    $STATIC_METHOD_TYPES = array(
+        \Piwik\Container\StaticContainer::get('') => [
+            "" == "@",
+        ],
+    );
+}