Normalize paths comming from `PYTHONPATH` before looking them up in `sys.path`.
Normalize paths comming from `PYTHONPATH` before looking them up in `sys.path`.

Fixes isandlaTech/cohorte-runtime#33.

isandlaTech/cohorte-runtime,ahmadshahwan/cohorte-runtime,ahmadshahwan/cohorte-runtime,isandlaTech/cohorte-runtime,isandlaTech/cohorte-runtime,isandlaTech/cohorte-runtime,ahmadshahwan/cohorte-runtime,ahmadshahwan/cohorte-runtime,isandlaTech/cohorte-runtime,isandlaTech/cohorte-runtime,ahmadshahwan/cohorte-runtime,ahmadshahwan/cohorte-runtime