Hapi 2.7 support

Hey guys,
I was playing around with Hapi during the last couple of weeks and just saw today that you have a nodeschool-like introduction (nice!) which was still running with the 1.20.x version. I enjoy learning about new feature the nodeschool way so here you go - hapi 2.7 support.

- updated furball and hapi dependency
- updated docs + solutions for hapi 2.x