Need to set SHELLY_HOME if set up Shelly manually.
Fix shelly-home.
Always load a configuration of Shelly.
Parse even an old Perl-style configuration file.
fresh-line before printing the result.
Add a configuration only when $SHELLY_HOME/shelly/init.sh exists.
Stop installation if the installing destination is same as loaded Shelly path.
Add a configuration file for csh and tcsh.