adjust readme for new plugin

create-schema.sql

@@ -0,0 +1,17 @@
+CREATE TABLE users (
+    id INTEGER AUTO_INCREMENT,
+    username VARCHAR(25) NOT NULL,
+    pw VARCHAR(512) NOT NULL,
+    super INT(1) NOT NULL DEFAULT 0,
+    PRIMARY KEY (id)
+);
+CREATE UNIQUE INDEX users_username ON users (username);
+
+CREATE TABLE acls (
+    id INTEGER AUTO_INCREMENT,
+    username VARCHAR(25) NOT NULL,
+    topic VARCHAR(256) NOT NULL,
+    rw INTEGER(1) NOT NULL DEFAULT 1,	-- 1 is read, 2 is write, 3 is readwrite, 4 is subscribe
+    PRIMARY KEY (id)
+    );
+CREATE UNIQUE INDEX acls_user_topic ON acls (username, topic(228));