Use UView instead of SwiftyOnboardPage

[ghost]

SwiftyOnboardDataSourceprotocol have the method swiftyOnboardPageForIndexreturning a SwiftyOnboardPage.

This is a huge limitation to SwiftyOnboard customisation. Please consider returning UIView instead of SwiftyOnboardPage .

[juanpablofernandez]

This is so there can be a quick setup with preset items in the view. I do understand the limitations behind this, and I'm working on a solution, it's not as easy as returning a UIView (This would remove the preset items, therefore removing the default layout).

[MockinMan]

Not sure what is the point of default layout when this library is basically useless because of static constraints and views it has for SwiftyOnboardPage. I didn't expect to have such constraints on customisation and basically spent time for nothing.

At least put a big red warning at the top "This Library Works With Only One Default Layout", so people don't waste their time, thank you.