Creates initial VC transitions project
Creates really simple nav controller sample with storyboard

There are 2 view controllers. The first has a button which pushes the
second onto the nav VC's stack.
Completes a simple project with a custom fade transition.
First draft of blog post for custom VC transitions done.

Need to re-read. And to look at a more complex example in the future.
Adds license header to source files
Adds screenshots showing fade process
Merge branch 'days/10-custom-vc-transitions'