Allow to use a specific Lisp image core for 'cl' command. (Only for SBCL, GNU CLISP, Clozure CL and AllegroCL)

Example:

    cl --core /path/to/sbcl.core -e '(princ "Hi, there.")'
Fix 0a49aae7f0d880e4c872a00df182415c5f3b9b10. getopt doesn't support long options.
Merge branch 'core-option' of github.com:fukamachi/CIM into fukamachi-core-option
untabify
don't shift ARGV. $1 is always the first argument.