Tosixinch

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**Add:**

* Add option '--force-download'.
* Add Python3.7.
* Improve Document.

**Fix:**

* Fix around 'plus' functions (with configfetch updates).

**Dev:**

* Add new test (_test_actualrun2.py).

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* Fixes and small improvements.
* Update configfetch.py library belatedly.

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* Several bug or inconvenience fixes.

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* First commit