added readme. bumped supermarket requirement version

package.json

@@ -26,7 +26,7 @@
         "node": ">=0.2.0"
     },
     "dependencies" : {
-        "supermarket" : ">=1.0.3"
+        "supermarket" : ">=1.0.5"
     }
 }
 

readme.txt

@@ -0,0 +1,51 @@
+This is a connect [1] session store using supermarket [2].
+
+It was written by Peteris Krumins (peter@catonmat.net).
+His blog is at http://www.catonmat.net  --  good coders code, great reuse.
+
+[1] http://github.com/senchalabs/connect
+[2] http://github.com/pkrumins/node-supermarket
+
+------------------------------------------------------------------------------
+
+Supermarket-cart can be used to store connect's sessions in supermarket database.
+
+Here is a full application that starts a server on port 9005. When you first
+visit the root page /, it sets session name to be 'pkrumins'. Then when you
+visit /whoami, it will tell your name:
+
+    var Cart = require('cart');
+    var connect = require('connect');
+
+    var server = connect.createServer();
+    server.use(connect.cookieDecoder());
+    server.use(connect.bodyDecoder());
+    server.use(connect.session({
+        store : new Cart({ dbFile : '/tmp/sessions.db' }),
+        secret : 'your secret'
+    }));
+    server.use(
+        connect.router(function (app) {
+            app.get('/', function (req, res) {
+                req.session.name = 'pkrumins';
+                res.writeHead(200, { 'Content-Type' : 'text/html' });
+                res.end();
+            });
+            app.get('/whoami', function (req, res) {
+                res.writeHead(200, { 'Content-Type' : 'text/html' });
+                res.end(req.session.name);
+            });
+        })
+    );
+    server.listen(9005);
+
+
+------------------------------------------------------------------------------
+
+Have fun storing sessions in a supermarket cart!
+
+
+Sincerely,
+Peteris Krumins
+http://www.catonmat.net
+