issue70:fixed samples for studio

We can update version numbers for samples, but I vote not to worry too much about it.  The version numbers are for people who use the toolkits to know if something is changed.  They are important when dealing with APIs.  For samples, these are not APIs, and people do not depend on samples.  Therefore, I opted not to update version number on samples, to reduce the maintenance cost.

For copyrights, officially, you do not need to list all years that the files have changed. Copyrights should include the first year and the last year that the file has been changed.