this is v0.8.0; follow branch's setup.py to get port's deps and reqs done

• python 3.5+ -> 3.4+;
• console_scripts was used, so added concurrent to USE_PYTHON;
• net/py-socks added to RUN_DEPENDS.

Reported by: koobs
Approved by: araujo (mentor), koobs
Differential Revision: https://reviews.freebsd.org/D17623