Include statements can now be marked with ``ignore missing`` to skip
non existing templates.

--HG--
branch : trunk
diff --git a/jinja2/nodes.py b/jinja2/nodes.py
index 405622a..9d78b25 100644
--- a/jinja2/nodes.py
+++ b/jinja2/nodes.py
@@ -274,7 +274,7 @@
 
 class Include(Stmt):
     """A node that represents the include tag."""
-    fields = ('template', 'with_context')
+    fields = ('template', 'with_context', 'ignore_missing')
 
 
 class Import(Stmt):