should be a mostly harmless refresh#8

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simevo wants to merge 4 commits intoahadik:masterfrom

Commits on Aug 23, 2018

flake8, docstrings (sort of)
Paolo Greppi
committed
default to source Token if no destination Token has been provided
Paolo Greppi
committed
make script executable
Paolo Greppi
committed
small fixes
Paolo Greppi
committed