文件操作使用拓展方法

抽取文件操作为拓展方法，新增混凝土报告生成选项
Merge remote-tracking branch 'origin/master'

Conflicts:
	obj/Release/TongGenerator_MarkupCompile.i.cache
	obj/Release/Views/TongGeneratOptions.g.cs
	obj/Release/Views/TongGeneratOptions.g.i.cs