* donate_cpu_lib.py: use `os.path.join()`
* donate-cpu: removed remaining usage of `os.chdir()`
* donate_cpu_lib.py: moved library includes code into class
* donate_cpu_lib.py: pre-compile library include regular expressions
* donate_cpu_lib.py: pre-compile some more regular expressions
* donate_cpu_lib.py: small unpack_package() cleanup and optimization
* donate_cpu_lib.py: added some information about the extracted files to unpack_package()
* donate_cpu_lib.py: bumped version
* added test_donate_cpu_lib.py
* donate_cpu_lib.py: greatly improved `LibraryIncludes.get_libraries()` performance
only scan each file once for previously undetected libraries only
* test_donate_cpu_lib.py: fix for Python 3.5
* scriptcheck.yml: added `-v` to pytest calls so we get the complete diff on assertions
* fixed `test_arguments_regression()` Python tests with additional pytest arguments
* donate_cpu_lib.py: use `subprocess.check_call()`
* test_donate_cpu_lib.py: sort results to address differences in order with Python 3.5
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