Fixed CLI option error

The options for --use-cj-version (-u) should have been renamed to
--cj-version (-C) in pull request #13. This CLI option renaming,
although implemented in usage() and getopt_log(), was not
implemented in the case switch statement.

This commit is a fix to that.
Merge pull request #38 from yookoala/cli-with-options-fix

Fixed CLI option error