Updated .gitignore to keep xtend-gen folders only (subfolders are excluded)
diff --git a/.gitignore b/.gitignore
index 0d22d34..649505e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,15 +3,18 @@
 # Eclipse target directories
 bin/
 target/
-!xtend-gen/.gitignore
-xtend-gen/
+
+# generated Xtend classes
+**/xtend-gen/*
+!xtend-gen/readme.txt
 
 # Xtend trace and binary files
 *.java._trace
 *.xtendbin
 
 **/TestModels/output/
+**/output/
 
-#pomless tycho fragments
+# pomless tycho fragments
 pom.tycho
 **/.polyglot.*