setup.py: now the documentation is handled in all available languages, bug fixed

src/setup.py

@@ -54,7 +54,7 @@ def get_data():
 
 def get_documentation ():
 	answer = [("documentation", ["documentation/license.txt"])]
-	depth = 10
+	depth = 20
 	for root, dirs, files in os.walk('documentation'):
 		if depth == 0:
 			break