Automatically convert strings to connectors if they are LoopBack connectors

lib/application.js

@@ -73,6 +73,8 @@ app.model = function (Model, config) {
   this.models[classify(modelName)] =
   this.models[camelize(modelName)] = modelFromConfig(modelName, config, this);
 
+  this.model(Model);
+
   return Model;
 }
 
@@ -235,6 +237,19 @@ function camelize(str) {
 }
 
 function dataSourcesFromConfig(config) {
+  var connectorPath;
+
+  assert(typeof config === 'object', 
+    'cannont create data source without config object');
+
+  if(typeof config.connector === 'string') {
+    connectorPath = path.join(__dirname, 'connectors', config.connector+'.js');
+
+    if(fs.existsSync(connectorPath)) {
+      config.connector = require(connectorPath);
+    }
+  }
+
   return require('./loopback').createDataSource(config);
 }