Add docHash to key_schema

settings.coffee

@@ -54,6 +54,7 @@ settings =
 				docLines: ({doc_id}) -> "doclines:#{doc_id}"
 				docOps: ({doc_id}) -> "DocOps:#{doc_id}"
 				docVersion: ({doc_id}) -> "DocVersion:#{doc_id}"
+				docHash: ({doc_id}) -> "DocHash:#{doc_id}"
 				projectKey: ({doc_id}) -> "ProjectId:#{doc_id}"
 				docsInProject: ({project_id}) -> "DocsIn:#{project_id}"
 				ranges: ({doc_id}) -> "Ranges:#{doc_id}"