Fixed arguments#8

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wommel wants to merge 6 commits intotymm:masterfrom

wommel:fixed_arguments

Commits on Mar 25, 2014

First attempt to implement the argument feature
tymm
committed

Commits on Mar 26, 2014

Describing new feature
tymm
committed

Commits on Mar 29, 2014

Commits on Dec 22, 2017

use exec and fixed arguments instead of system to avoid escaping hell
Wommel
committed