Add wrappers around XMLReader and SimpleXMLElement to improve error handling

src/Spout/Reader/Exception/XMLProcessingException.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Box\Spout\Reader\Exception;
+
+/**
+ * Class XMLProcessingException
+ *
+ * @package Box\Spout\Reader\Exception
+ */
+class XMLProcessingException extends ReaderException
+{
+}