Fix for #20

See #20

Basically, I edited `lib/dox-foundation.js` to pass one extra variable that defines current file we're rendering a template to, so we can figure out how deep the links should be.

```js
  // How deep is your love?  
  if(file.currentFile.split('/').length > 1 ){
    targetLink = Array(file.currentFile.split('/').length).join('../') + file.targetFile;
  } else {
    targetLink = file.targetFile;
  }
```