Wolox iOS style guide

We follow GitHub's Swift style guide and we enforce it using SwiftLint and Linterbot. We also follow Apple's API design guidelines.

• Extract view logic from controller
• Immutable controllers
• Use lazy actions
• Extract presentation logic into view models
• Use extensions when conforming to protocols
• Use private extensions for private methods
• Use property hooks to configure outlets
• Avoid structs that use closure that capture self
• Dependencies should always be protocols.
• Table view cell identifiers should be inferred from the class name.
• Public properties should appear before private ones.
• Avoid using frame and bounds properties to add child views.