Install scripts as scripts

We need to install scripts with a common naming scheme, so they are easy accessible once mdml-tools is installed.

I am thinking of something like:

mdml-...

Like:

mdml-count-words myfile.tex -n 5

or:

mdml-kill-slurm-jobs

I could imagine that if you have a shell that supports autocompletion those scripts might even be selectable then, as once as you start typing "mdml-"