Utility function to handle tar files

[kenkehoe]

There are times when the data files are delivered in a TAR file. The DQ Office have some utilities for handling TAR data files, including creation of a temporary directory and clean up after the extracted files are used. Would be good to add these utility functions to ACT for others to utilize.

[zssherman]

I agree! I know In Py-ART we have functionality for this, let me see if I can dig it up.

[AdamTheisen]

@kenkehoe do you think we would put this in the read functions so that if it's a .tar or .tar.gz file, it would call this utility to untar them into a temp directory, read in and then clean up?

[kenkehoe]

OK I'll put in read functions. Good idea.

[kenkehoe]

In the current PR I have utility functions for creation of TAR and gunzip files, extraction of TAR and gunzip, cleanup of extracted TAR directory and implemented into general reading routine. I assume the functions all exist in Mac, Linux, Windows but we will see with testing.

[kenkehoe]

Looks to be an issue with a temporary directory call within a temporary directory call.