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

--HG--
branch : trunk
diff --git a/jinja2/compiler.py b/jinja2/compiler.py
index 54a80ba..e17aa1d 100644
--- a/jinja2/compiler.py
+++ b/jinja2/compiler.py
@@ -818,22 +818,35 @@
 
     def visit_Include(self, node, frame):
         """Handles includes."""
+        if node.ignore_missing:
+            self.writeline('try:')
+            self.indent()
+        self.writeline('template = environment.get_template(', node)
+        self.visit(node.template, frame)
+        self.write(', %r)' % self.name)
+        if node.ignore_missing:
+            self.outdent()
+            self.writeline('except TemplateNotFound:')
+            self.indent()
+            self.writeline('pass')
+            self.outdent()
+            self.writeline('else:')
+            self.indent()
+
         if node.with_context:
-            self.writeline('template = environment.get_template(', node)
-            self.visit(node.template, frame)
-            self.write(', %r)' % self.name)
             self.writeline('for event in template.root_render_func('
                            'template.new_context(context.parent, True, '
                            'locals())):')
         else:
-            self.writeline('for event in environment.get_template(', node)
-            self.visit(node.template, frame)
-            self.write(', %r).module._body_stream:' %
-                       self.name)
+            self.writeline('for event in template.module._body_stream:')
+
         self.indent()
         self.simple_write('event', frame)
         self.outdent()
 
+        if node.ignore_missing:
+            self.outdent()
+
     def visit_Import(self, node, frame):
         """Visit regular imports."""
         self.writeline('l_%s = ' % node.target, node)