BNDView bindings improvements

Added BINDINGS and BINDViewModel macros to ease binding from code for BNDView.

Shorthands and observe:

• shorthands
  • BINDO()
  • BINDOS()
  • BINDS()
  • BINDSL()
  • BINDSR()
• observe:

BIND() macro and transform:

• macros that create bindings and allow for compile time keyPath checking
  • BIND()
  • BINDT()
  • BINDNT()
• transform: method

Asynchronous Transformers

• added support for asynchronous value transformers
• added BNDButton

Special Keypaths and Autoinvalidate

• bindings now invalidate automatically, there should be no KVO exceptions raised on dealloc
• included backward compatibility to shorthand bindings for views (text -> textLabel.text) instead of (viewModel.text -> textLabel.text) which was lost in previous version
• special keypaths are added
  • UIButton -> onTouchUpInside
  • UITableViewCell -> onTouchUpInside

Added special keypaths

• special keypaths added to enable binding to i.e. button actions
• fire and forget memory management for bindings

MVVM

This release is focused on MVVM and includes more protocols and concrete implementations of UIKit subclasses for binding from XIB

• UIView
• UIViewController
• UICollectionViewCell

Bug fixes

• fixed a memory management issue on BNDTableViewCell where view model would get dealloc'd before unbinding.