Possible changes to setup.exe interface and name

[Michael Benford]

I would like to change the setup.exe so that it loads the package  
selection page when it starts.
And only runs the wizard when a current installation of the current  
version is not detected.

The file name setup.exe is ambiguous if stored in a folder with other  
application installation files.
I suggest using the file name cygpac.exe and application name Cygwin  
package manager.

I am happy to implement both of these changes my self but I need feed back  
and permission from the community.