Run one process for command by default, add `--concurrent` option#29

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aoberoi wants to merge 11 commits intoopen-cli-tools:masterfrom aoberoi:non-concurrent-issue-20

+108-24

Commits on Mar 16, 2016

style mistakes in test
aoberoi
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Commits on Mar 21, 2016

Commits on Mar 23, 2016

Commits on Mar 25, 2016

Commits on Dec 22, 2018

fix an import by deleting the .default property
aoberoi
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Commits on Dec 23, 2018

Revert "fix an import by deleting the .default property"
aoberoi
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