Created Gruntfile.js adding tasks to build Jade templates, compile sass ...

Created Gruntfile.js adding tasks to build Jade templates, compile sass files, and copy assets. 
Try using '**/*' instead. The destination path may also be an issue. I tend to use absolute paths in grunt/gulp files. So you would have a `var BASE_PATH = __directory`. Then you could do `var OUTPUT_PATH = path.join(BASE_PATH, 'build')`. I tend to wrap this in an object instead of constants, so it would be...

```js
var PATHS = {
    output: path.join(__directory, 'build'),
    ... // other source or output paths here
}
```

Also, I prefer to use `path.join` to concat directory paths. It provides better cross platform compatibility and is better than a bunch of `+` signs.

```js
var path = require('path');

path.join(respokeStyle.paths.assets, '**/*');
```