TY should be the first tag when writing records

Author: krlwlfrt

CREDITS

@@ -1,2 +1,2 @@
 Matt Butcher [technosophos] <[email protected]> (lead)
-Karl-Philipp Wulfert [animungo] <animungu@example.com> (contributor)
+Karl-Philipp Wulfert [animungo] <animungu@gmail.com> (contributor)

src/LibRIS/RISWriter.php

@@ -50,6 +50,9 @@ public function writeRecord($tags) {
     $buffer = array();
     $fmt = '%s  - %s';
 
+	 $buffer[] = sprintf($fmt, 'TY', $tags['TY'][0]);
+	 unset($tags['TY']);
+
     foreach ($tags as $tag => $values) {
       foreach ($values as $value) {
         $buffer[] = sprintf($fmt, $tag, $value);