Refactor gesture recognizer spec helper to improve readability

- This also removes undesired retains of recognizer targets
Remove requirement of manually whitelisting gesture recognizer targets
Add test for triggering a segue using the gesture recognizer spec helper
Add changelist items
Normalize whitespace in the gesture recognizer spec helper
Merge pull request #78 from pivotal-brian-croom/improve-gesture-recognizer-spec-helper

Improve gesture recognizer spec helper