2.完善指令消息注释

2.增加字段验证扩展，用于协议长度验证
3.完善部分方法注释

2.将demo6修改为DI注册方式
3.修改文档

1.修复0x8103消息的自定义id反序列化时报错
2.新增0x8103消息的自定义id的测试用例

3.更改版本号

4.移除依赖注入扩展项目
5.将依赖注入以扩展的形式写入主项目中

6.更新说明文档
7.修复IJT808Builder的修饰符为Interface

Author:    waterliu99 <qqcc2012game@163.com>
Date:      Wed Jul 3 18:57:39 2019 +0800
    squash 2fcc930 更改版本号
    squash c0e7fc1 1.移除依赖注入扩展项目 2.将依赖注入以扩展的形式写入主项目中
	modified:   src/JT808.Protocol.Extensions.DependencyInjection.Test/JT808.Protocol.Extensions.DependencyInjection.Test.csproj
	modified:   src/JT808.Protocol.Extensions.DependencyInjection.Test/Program.cs
	modified:   src/JT808.Protocol.Test/JT808.Protocol.Test.csproj
	new file:   src/JT808.Protocol.Test/MessageBody/JT808Formatters/JT808_0x8103_0x0075_Formatter.cs
	new file:   src/JT808.Protocol.Test/MessageBody/JT808_0x8103CustomIdExtensions/JT808_0x8103_0x0075.cs
	modified:   src/JT808.Protocol.Test/MessageBody/JT808_0x8103Test.cs
	modified:   src/JT808.Protocol.sln
	new file:   src/JT808.Protocol/DependencyInjectionExtensions.cs
	modified:   src/JT808.Protocol/Extensions/JT808FormatterResolverExtensions.cs
	modified:   src/JT808.Protocol/Formatters/MessageBodyFormatters/JT808_0x8103_Formatter.cs
        new file:   src/JT808.Protocol/IJT808Builder.cs