copy arguments should be escaped by quotes

To build successfully solution situated on spaced path (i.e. "d:/dynamo sources/") double quotes are added for `copy` arguments.

![image](https://cloud.githubusercontent.com/assets/8158551/5359355/4c6bebae-7fc5-11e4-8946-0705bef5d04c.png)

@sharadkjaiswal, please, take a look.