Refactor CLI arguments

[mschoeb]

Right now CLI arguments are handled by a big loop in RumbleRuntimeConfiguration with a map for shortcuts and some cases. This leads to errors like unrecognized options (without a value) giving a nullpointer and options not being stackable (-vtis not possible for -v -t). I suggest we rework this possibly with a library specific for handling cli options to reduce our code complexity and error potential.

On the same note, adding --help and --version to print all the options or the version number would be really nice.