Kubedeps: a shell script kubexit alternative

[toniopelo]

I wanted to use kubexit (and thanks for this great tool), but it seems that it's not really maintained anymore and I needed some of the long-time requested feature on this repo. Then I created this little tool that does the job for me and figured that I could share it for other in my situation. I don't promise a first class support/maintenance on this but this is simple enough to be tweaked as you wish. It was built with kubexit inspiration and some of the asked feature/bugfixes are included (overriding exit code / picking up tomstone that were created before kubexit spawned / etc).