RayWenderlich Swift Style Guide Updated for Swift 3

The Swift Style Guide has been updated to align with Swift 3, emphasizing consistent naming conventions from the new API Design Guidelines to improve code readability and predictability. Key changes include adopting the new access control keywords, promoting the use of context for clearer code, and maintaining a two-space indentation for formatting. The guide also addresses how methods should be referred to in prose to avoid ambiguity and encourages keeping style rules minimal to aid newcomers. Overall, the update reflects Swift 3's enhancements and community feedback to ensure clearer, more maintainable Swift code.