Add postgres upgrade-8.sql to add 'configuration' table

Author: Lloyd Watkin

postgres/upgrade-8.sql

@@ -0,0 +1,10 @@
+BEGIN TRANSACTION;
+
+CREATE TABLE "configuration" ("key" TEXT NOT NULL,
+            "value" TEXT NOT NULL,
+            "updated" TIMESTAMP);
+
+INSERT INTO schema_version (version, "when", description)
+       VALUES (8, 'now', 'Added configuration table');
+
+COMMIT;