added deprecation warning + fixed logging in migrator.js

lib/migrator.js

@@ -15,10 +15,12 @@ module.exports = (function() {
       to: null,
       logging: console.log
     }, options || {})
-  }
 
-  if(this.options.logging === true)
+    if(this.options.logging === true) {
+      console.log('DEPRECATION WARNING: The logging-option should be either a function or false. Default: console.log')
       this.options.logging = console.log
+    }
+  }
 
   Object.defineProperty(Migrator.prototype, "queryInterface", {
     get: function() {

lib/sequelize.js

@@ -16,8 +16,10 @@ module.exports = (function() {
       sync: {}
     }, options || {})
 
-    if(this.options.logging === true)
+    if(this.options.logging === true) {
+      console.log('DEPRECATION WARNING: The logging-option should be either a function or false. Default: console.log')
       this.options.logging = console.log
+    }
 
     this.config = {
       database: database,