EiffelStudio 6.5 released

This is the final release of EiffelStudio 6.5. This version fixes some issues with STRING not updating its hashcode in `remove_substring', a C compilation error after a finalization, some various issues with AutoTest and the debugger. Fixed a CECIL issue and a compatibility issue with old storables that could not be retrieved in 6.5.

Happy Eiffeling!
The EiffelStudio Team