Add draft notices to 1.1 draft

Author: pnorman

shortbread-website/content/schema/1.1.md

@@ -1,10 +1,12 @@
 +++
-title = "Vector Tile Schema 1.1"
-linkTitle = "1.1"
-description = "This page describes the layers of the Shortbread vector schema and their contents as of version 1.1"
+title = "DRAFT Vector Tile Schema 1.1"
+linkTitle = "1.1 DRAFT"
+description = "This DRAFT page describes the layers of the Shortbread vector schema and their contents as of version 1.1"
 toc = true
 +++
 
+## DRAFT
+*This is a DRAFT version of the 1.1 specification and subject to change.*
 
 ## About