Added basic custom animations and a fix for the view being accessed before adding it to the parent controller

[jonasman]

Added an iPhone example

[sparga]

Thank you for the pull request.
I have quickly reviewed the code and it seems good. One thing, when you set a block with objc_setAssociatedObject the last parameter should be OBJC_ASSOCIATION_COPY instead of OBJC_ASSOCIATION_RETAIN_NONATOMIC. Like with properties, a block should always be copied.

I will check it more precisely. See my answer for issue #11, custom blocks are a simple solution but it lacks some flexibility as you noticed. Maybe for a v1.x it is enough and wait for the next major release to implement a better solution. I will also ask @leverdeterre about that.

[jonasman]

Yeah! that COPY must be changed.

For a better implementation we need to give full control to the block or delegate call.
Another option is to create a class to make the animations and that class accept any kind of animation and also adds "pre installed" animations. Then you just ask this calss for an animation.

Kinda like some other libs are doing.

[jonasman]

I just made 1 more commit to fix those