Delegates, More customization of text

• Send back progress as delegate methods to let called know which node is being displayed currently and when Spotlight ends
• Allow customizing text for next and back buttons
• Don't show next and back buttons if they are not available as an action

Allow Spotlights over full screen

• Allows Spotlights over Tabbar items now (new enum case in SpotlightTarget)
• Several tweaks, and updates to sample project

1.2.0

First stable public release.

• Code based Spotlights
• Timer based automatic forwarding (configurable)