Update extract-plural-forms.py
Update extract-plural-forms.py

Handle errors, update table URL for upstream data.

alexhenrie/poedit,alexhenrie/poedit,vslavik/poedit,alexhenrie/poedit,alexhenrie/poedit,vslavik/poedit,nawawi/poedit,vslavik/poedit,nawawi/poedit,PKRoma/poedit,nawawi/poedit,vslavik/poedit,PKRoma/poedit,PKRoma/poedit,alexhenrie/poedit,vslavik/poedit,PKRoma/poedit,PKRoma/poedit,nawawi/poedit,nawawi/poedit