New port: devel/py-tblib

Pickle tracebacks and raise exceptions with pickled tracebacks in
different processes. This allows better error handling when running
code over multiple processes (imagine multiprocessing, billiard,
futures, celery etc).
Parse traceback strings and raise with the parsed tracebacks.

WWW: https://pypi.python.org/pypi/tblib

PR: 211051
Submitted by: Danilo G. Baio <dbaio@bsd.com.br>