Several unrelated minor changes.

Several unrelated minor changes.

Remove two obsolete build configurations.

Add two environment variables that will cause OpenZGY to turn on logging in the SADPI cloud access layer.

React to changes in SDAPI build rules. The parameter to enable Azure has been renamed.

Fix a problem in the Python version of the copy tool. Coordinate information in the input file should be optional.

Ensure the Python unit tests can be run from make in a clean work area. The tests use a temporary folder for the test data. The Makefile rules need to create that folder if it doesn't exist yet.

Improve some of the examples in the main README file. Phrases like "You can run them on Linux also by adjusting the paths" aren't very user friendly. The example should show what those adjusted paths are.