Regexp jinja filter

Add a custom filter for very basic regexp substitution.

filter_plugins/re_sub.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# A quick and dirty regexp replacement filter
+
+import re
+
+def re_sub(s, p, r):
+    return re.sub(p, r, s)
+
+class FilterModule(object):
+    '''
+    custom jinja2 filter for regexp substitution
+    '''
+
+    def filters(self):
+        return {
+            're_sub': re_sub
+        }