Laravel 5.5 support

Now supports Laravel 5.5 which binds view engines to a different interface.

Thanks @bagf

Fix for config caching

And removal of previously undocumented feature, automatically calling ->toArray() on top-level objects passed through as view data.

Able to provide a Context object instead of an array of data

Merge pull request #3 from kelvinj/master

Able to provide a Context object instead of an array of data