modified:   bin/plato
- sys.path is now prepended (vs. appended)
- Scheduler class in plato.schedule now has a factory called create().
  Can be used to instantiate certain scheduler engine via config

deleted:    src/plato/metashell.py
deleted:    src/plato/platform_lsf.py
- Those scripts made obsolete to shift the priority and need to work with
  sh module (if one does shell integration, alt. directly subprocess.Popen).

modified:   src/plato/schedule/__init__.py
new file:   src/plato/schedule/local.py
- New scheduler engine was implemented. Allows spawning processes
  locally.

modified:   src/plato/schedule/lsf.py
- Minor adaptations related to creation of schedule/local.py

new file:   src/plato/shell/__init__.py
renamed:    src/plato/coreutils.py -> src/plato/shell/coreutils.py
renamed:    src/plato/findutils.py -> src/plato/shell/findutils.py
- Leftovers of python scripts mimicking shell integration moved here.