Remove CardTransformerProvider class

[mac-gallagher]

• Remove CardTransformerProvider class
• Rename (internal) SwipeCardDelegate methods to be more consistent with UIScrollViewDelegate naming conventions
• Add cardDidFinishSwipeAnimation delegate method in favor of using the Notification Center
• Remove CardStackAnimatableOptions and CardAnimatableOptions protocols as they served no purpose

[codecov-io]

Codecov Report

Merging #139 (48bc7dc) into master (48b8f4a) will decrease coverage by 0.1%.
The diff coverage is 85.4%.

@@           Coverage Diff            @@
##           master    #139     +/-   ##
========================================
- Coverage    84.1%   83.9%   -0.2%     
========================================
  Files          11      10      -1     
  Lines         724     715      -9     
========================================
- Hits          609     600      -9     
  Misses        115     115             

Impacted Files	Coverage Δ
...uffle/Classes/SwipeCard/CardAnimationOptions.swift	100.0% <ø> (ø)
...ses/SwipeCardStack/CardStackAnimationOptions.swift	100.0% <ø> (ø)
...fle/Classes/SwipeCardStack/CardStackAnimator.swift	0.0% <0.0%> (ø)
...Classes/SwipeCardStack/CardStackStateManager.swift	100.0% <ø> (ø)
Sources/Shuffle/Classes/SwipeCard/SwipeCard.swift	100.0% <100.0%> (ø)
...huffle/Classes/SwipeCardStack/SwipeCardStack.swift	100.0% <100.0%> (ø)