add .pmd to gitignore

ef4da740 · Noel Grandin · 07252ecf · ef4da740
--- a/.gitignore
+++ b/.gitignore
@@ -16,4 +16,5 @@
 *.iws
 .checkstyle
 /temp/
-/h2web/
\ No newline at end of file
+/h2web/
+.pmd
\ No newline at end of file