Update timeago plugin

Fixes #18
diff --git a/static/js/lw-timeago b/static/js/lw-timeago
index 4ec306b..270ee6c 160000
--- a/static/js/lw-timeago
+++ b/static/js/lw-timeago
@@ -1 +1 @@
-Subproject commit 4ec306b181abad6305e469fffe288e806eb540e4
+Subproject commit 270ee6c34954ef4f6a635d00552fb75c47225a3f