Cannot find symbol 'SliderLayout'

Hi,

I face issue import the library.

I follow the wiki by include this in my gradle

```
compile "com.android.support:support-v4:+"
compile 'com.squareup.picasso:picasso:2.3.2'
compile 'com.nineoldandroids:library:2.4.0'
compile 'com.daimajia.slider:library:1.1.5@aar'
```

I sync the gradle with my project.

Still i face the cannot find symbol ;..

Any idea?
Thank