v0.8.0

--debug flag introduced to skip error/exit handling module. In brief, errors are caught and processed differently under --debug modes. Convenience features have been added to the standard invocation to provide an "exit summary", describing (clearly) the 'last loggable line', abbreviates the logging to stderr, captures traceback objects, errors, program "steps" and "features" (described in config.py) where the program failed, and other relevant metadata.

Use --debug if the program exits early or with no logged information.

kmerdb usage -m method introduced

Revisions tested across the board.

profile, graph, usage, matrix, distance, kmeans, and hierarchical have been acceptance tested.