Slides are not sized properly

[peacechen]

The slides should fit within their parent node. After the update to Famous 0.6x, the slides size incorrectly to the parent's selector.

[peacechen]

Included a work-around for this in the examples in commit 399f990.

The scene selector element must not have any padding. The bug is logged at:
Famous/engine#411

Leaving this open until a decision is made for that engine issue.

[peacechen]

Engine fix awaiting merge Famous/engine@3ffb61f