No modify owin startup setting in webconfig

[nick-hoang]

After install the package, add the Orc.Fortress dll to the references of web project, then follow below sample to config the startup part:

`public class Startup: UmbracoDefaultOwinStartup
{
public override void Configuration(IAppBuilder app)
{
base.Configuration(app);

    **Orc.Fortress.Startup.FortressOwinStartup.ConfigureServices(app);**
    
}

protected override void ConfigureMiddleware(IAppBuilder app)
{
    **Orc.Fortress.Startup.FortressOwinStartup.ConfigureMiddleware(app);**

    base.ConfigureMiddleware(app);
}

}`