Add sln file

This reverts commit 5b8b39fc2cdd20c3ef2419defaec0e78ca8c8cbf.

Conflicts:
	Training.CMS/Training.CMS.Sql/Training.CMS.Sql.sqlproj
	Training.CMS/Training.Data/Training.Data.csproj.user
	Training.CMS/Training.Domain/Properties/AssemblyInfo.cs
	Training.CMS/Training.Service/UserService.cs
	Training.CMS/Training.Test/UserTest.cs
	Training.CMS/Training.Web/Training.Web.csproj