Updated Demo 2 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.
Should really have been in last check in

Forgot to include this file in the last check in.
Removed unnecessary files.

Actually, updating the Caliburn.Micro.Start package re-added some files
that are actually already contained within the project, just in
different folders, so these have been deleted.
Updated Demo 3 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.
Updated Demo 4 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.
Updated Demo 5 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.
Updated Demo 6 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.
Updated Demo 7 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.
Updated Demo 8 to use latest nuget package

There has been a substantial update to the Caliburn.Micro package, so I
have updated the package that is used my this sample application.