Do not print out options all th etime
Show stacktrace when an (internal) exception hits us

Before, we swallowed the stacktrace and all auxiliary exception information
Move option parsing into its own helper method
Clarify parameters of run
Remove outdated docstring
Move error handling into main
correct typo
remove typo
Cut down rogue calls to exit
Use standard usage output format
small typo
Improve command-line parsing
Ignore coverage HTML output
[parser] Improve testing and error handling