Add io.scm.

Signed-off-by: Casey Dwyer <caseydwyer@gmail.com>
Add char.scm.

Signed-off-by: Casey Dwyer <caseydwyer@gmail.com>
Add list.scm.

Signed-off-by: Casey Dwyer <caseydwyer@gmail.com>
Rewrite cgi.scm.

Signed-off-by: Casey Dwyer <caseydwyer@gmail.com>
Rename cgi.scm -> http.scm.

Signed-off-by: Casey Dwyer <caseydwyer@gmail.com>