First of paragraph of Classes and Structures

First of paragraph of Classes and Structures is finished.
Started Definition Syntax in Chapter 09
Starting Dot Syntax
Done at Memberwise Initializers for Structure Type

Starting Structures and Enumerations Are Value Types
Done *value type

Started “Classes Are Reference Types”
Done Identity Operators

Started Pointers
finish bitwise not or and xor
translate to bitwise shifting
translate to bitwise shifting
fishi 23 advanced operators
Done Assignment and Copy Behavior for Dictionaries

Starting Assignment and Copy Behavior for Arrays
Merge pull request #93 from stanzhai/develop

【校对】添加下划线-----------------
update underscore
Update 04_Collection_Types.md

修改一个中文句号为英文点号
Update 05_Control_Flow.md
修改：当conform的宾语为protocol的时候，conform译为“遵循”。
添加章节跳转链接和修改一些格式
增加章节内每小节跳转
Merge pull request #95 from bzsy/patch-3

Update 04_Collection_Types.md
Merge pull request #96 from bzsy/patch-4

Update 05_Control_Flow.md