Add spec for deselector directive
Add spec for navigator.addSentences()
Add spec for navigator.currentSentence()
Add spec for navigator.state()
Mark functions as functions in navigator specs
Add spec for navigator.updateId()
Add a third sentence to the navigator specs
Add spec for navigator.sentenceToString()
Fix typo in navigator.reset()
Add spec for navigator.reset()
Add specs for nextSentence() and prevSentence()
Add specs for navigator.goToLast() and goToFirst()
Make navigator.movePosition() private
Add comment for future work in navigator
Add spec for navigator.goTo()
Add specs for navigator.hasNext() and hasPrev()