Show help if no commands are specified.
Deleted App::shelly::command::run_repl.
Don't load an init file when using Allegro CL.
Don't print the help message when `shly --version'.
Don't eat a keyword argument "--version" unnecessarily.
Change the format of error messages a little bit.
Don't decide which shlyfile to load in bin/shly script.
Fix --help didn't print the result of pod2usage.
Fix that the return code was opposite.
Bug fixes for Allegro CL.
Fix loading an init file when running an usual command on Allegro CL.
Set SHELLY_VERSION.
Kill a child CL process when receive signals.
`exec' was a better choice.
Pass a command arguments as a list to avoid 'sh -c "..."'.

http://perldoc.perl.org/functions/exec.html