provide option to not delete temporary zip file

[hupfdule]

For debugging purposes it would be nice if the rice command would provide an option to leave the temporary zip file intact.
One could then unzip it to see if it contains the expected files.

[dncohen]

Try testing the executable itself. i.e. unzip -t <executable>

[hupfdule]

When using -t I can't check the contents of the files itself.

And trying to really extract it I get the following error message:

 extracting: ..-templates
 checkdir error:  ..-templates exists but is not directory
                  unable to process ..-templates/template1.

[GeertJohan]

Sounds like a useful extra feature! PR is welcome :)