Removed dependencies and synchronous IO operations#3

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jacamera wants to merge 6 commits intofeature23:masterfrom

reallyreadit:original-2.0.0

Commits on Oct 25, 2019

removed all dependencies
jacamera
committed

Commits on Oct 26, 2019

converted tests to use mail text content instead of mime message
jacamera
committed
updated packing info and readme for pull request to original author
jacamera
committed

Commits on Oct 30, 2019