invalid command line options produces stack trace

[anewton1998]

This should be more graceful.

$ jcr -Q
/home/andy/.rvm/gems/ruby-2.3.4@draft-rdap-jcr/gems/jcrvalidator-0.8.0/lib/jcr/jcr.rb:259:in `main': invalid option: -Q (OptionParser::InvalidOption)
	from /home/andy/.rvm/gems/ruby-2.3.4@draft-rdap-jcr/gems/jcrvalidator-0.8.0/bin/jcr:25:in `<top (required)>'
	from /home/andy/.rvm/gems/ruby-2.3.4@draft-rdap-jcr/bin/jcr:22:in `load'
	from /home/andy/.rvm/gems/ruby-2.3.4@draft-rdap-jcr/bin/jcr:22:in `<main>'
	from /home/andy/.rvm/gems/ruby-2.3.4@draft-rdap-jcr/bin/ruby_executable_hooks:15:in `eval'
	from /home/andy/.rvm/gems/ruby-2.3.4@draft-rdap-jcr/bin/ruby_executable_hooks:15:in `<main>'

[anewton1998]

fixed in #111