Standalone server initial implementation

- no dependency over Windshaft.Server

test/acceptance/multilayer_server.js

@@ -7,8 +7,8 @@ var _ = require('underscore');
 
 
 var PgQueryRunner = require('../../lib/cartodb/backends/pg_query_runner');
-var CartodbWindshaft = require('../../lib/cartodb/cartodb_windshaft');
-var serverOptions = require('../../lib/cartodb/server_options')();
+var CartodbWindshaft = require('../../lib/cartodb/server');
+var serverOptions = require('../../lib/cartodb/server_options');
 var server = new CartodbWindshaft(serverOptions);
 server.setMaxListeners(0);
 
@@ -346,7 +346,7 @@ describe('tests from old api translated to multilayer', function() {
                 };
 
                 // reset internal cacheChannel cache
-                serverOptions.channelCache = {};
+                server.channelCache = {};
 
                 assert.response(server,
                     {