Update to Swift 3.

Code clean up.

Improvements to WPSTextView.

Provide better support for text views with borders.

Add Swift version of WPSTextView.

Add function to find the table view for the cell.

Add UICollectionReusableView extension.

Mark init as public.

Add loadFromNib() UIView extension.

Post image code to Swift.

Remove URL methods to NSURL. Fix file URL issue with tmp directory.