Ignore transpiled .java and .class files (github#3016)

kevin51jiang · shiftkey · commit 7eef17f37c63 · 2019-03-27T08:31:02.000-03:00
diff --git a/Processing.gitignore b/Processing.gitignore
@@ -7,3 +7,4 @@ application.linux64
 application.windows32
 application.windows64
 application.macosx
+out
