1.0.58

- Optimizely for iOS is out of beta!
- Adds support for Universal User ID (beta). Target experiments to identified users, and variation bucketing + counting will be consistent across multiple iOS devices. [Learn More](http://developers.optimizely.com/ios/#uuid)
- Default tracking of session frequency and length for all new experiments
- Revenue goals 
- New retention reports
- New goal metrics 
- New Visual Editor: Optimizely now has a brand new visual editor that makes it easy to create your A/B tests
- Removed the need for `OptimizelyPrepareNibs.rb`. you no longer need to run this script to use the visual editor
- New gesture for entering into Edit Mode: just draw the Optimizely O to get into edit mode
- Optimizely URL Scheme is now required for edit mode
- Fixed bugs found in 0.8.57