Component 0.14 and Node 0.10 support

As of component 0.14.0, the builder has renamed the `conf` property to `config`. There has also been a change as of Node 0.10 that makes path.join throw a TypeError `Arguments to path.join must be strings`. 

This pull request makes sure it works on component 0.14 and also makes sure the realSassFiles doesn't throw an error on node 0.10.