Merge pull request #10 from enygma/get-single-content

allow for the pull of a single value using getContent on the Parser class

src/Parser.php

@@ -234,8 +234,11 @@ private function parseKeyValue($raw_line)
      *
      * @return array The .env contents
      */
-    public function getContent()
+    public function getContent($keyName = null)
     {
+		if (!is_null($keyName)) {
+			return (array_key_exists($keyName, $this->lines)) ? $this->lines[$keyName] : null;
+		}
         return $this->lines;
     }
 }