Improve and test support for customized templates

Change-Id: I7209c247b01dc06078d84c18e0a7beed80c6a62c
diff --git a/.gitignore b/.gitignore
index c954958..aa3cfbb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,6 +17,7 @@
 .sass-cache
 dev/css
 templates/announcement.html.ep
+templates/custom
 log
 blib
 script*