Changing directory structure to the one needed by mlib
Got back to old folder structure, since mLib doesn't support
haxelib.json
Added license-header to sourcefiles
.
Back to mLib
process is with mLib now

Now I have to wait, that a version supporting the haxelib3 stuff is
offcially available. For now I use a modified version I cloned from
<https://github.com/wighawag/MassiveLib>