Crowdin has depreciated their old api and will shut it down completely
in december 2021.
What's new:
* rewritten in Python 3 (drops support for discontinued Python 2)
* uses Crowdin's api v2
* runs on vanilla Python 3, (no external modules)
* automatically adds new translation from the src directory
* supports api token to be specified in an environment variable
(Makes GitHub integration easier in the future)
* requires project id to be explicitly set with an environment variable
(Makes testing safer)
The api token can be set either in ~/.crowdin-freecad-token similar to
how the old api key was set, or by specifying it in an environment
variable. The later has been added to make it easier with GitHub-Crowdin
integration in the future.
The requirement to explicitly set CROWDIN_PROJECT_ID has been introduced
to avoid accidentally using the main Crowdin project while testing the
script.
The script has been tested on Python versions 3.7, 3.8 and 3.9.
Co-authored-by: Mattias Pierre <github@mattiaspierre.com>
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