Move of Casskop repo to https://github.com/cscetbon/casskop

[fdehay]

Dear Casskop user,

Thanks for your interest in Casskop, it has been a pleasure to see this project evolve and reach this point today!

We hope that Casskop will continue to provide as yet unrivalled functionnalities in the deployment of multi-k8s, C* clusters with essential services like backup&restore

As Orange is scaling down its involvment in the project largely due to internal reorganisation and a change of priorities, we are happy to announce that @cscetbon has accepted to fork the repo and keep it alive.
The new repo for Casskop is now https://github.com/cscetbon/casskop

Thanks again @cscetbon for all the work you put in on this project!