For drag-and-drop binded local project, there is no choice dialog presented

As we talk about before, if the user drag and drop a binded  local project, the handle process should be just the same with the scene without 'Replace' feature. 
The process result is that there is no choice dialog presented, and the console just show some messages as before.

![issue4_forbindedlocalprojectdoesnothing](https://cloud.githubusercontent.com/assets/7316500/4344431/f76b8f02-408f-11e4-8ca1-6f788adc0149.PNG)