Wolox iOS style guide

We follow GitHub's Swift style guide and we enforce it using SwiftLint and Linterbot.

• 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.