add main.scm
call main.scm inside main.c
fix main.scm
no exit
move the repl source to under piclib
[bugfix] command-line returned reversed list of command line arguments
[bugfix] case doesn't compare string equality
print takes an optional argument for output port, and returns obj itself
support file execution
exit status
-h option should return exit status 1
[bugfix] print should print a newline to given port
[bugfix] interleave newline
comment out an assertion
Merge branch 'rewrite-repl-in-scheme'