* Translations for Chapter 3 part 01 for Swift 4.0/4.1
* update chapter 3 part 02 for swift 4.1
* update chapter 3 part 03 for Swift 4.1
* update chapter 1 part 01 for Swift 4.1
* update chapter 1 part 02 for Swift 4.1
* update chapter 1 part 03 for Swift 4.1
* update chapter 2 part 01 for Swift 4.1
* update chapter 2 part 02 for Swift 4.1
* update chapter 2 part 3 for Swift 4.1
* update "summary" and corrected file names
* update chapter 2 part 4 for Swift 4.1
* update chapter 2 part 5 for Swift 4.1
* update chapter 2 part 6 for Swift 4.1
* update chapter 2 parts 06-11 and other parts' errors
* update chapter 2 parts 12-14
* update chapter 2 parts 14-19
* update all chapter 2
* update whole chapter 1
* update some parts of chapter 3
