Fix typos, remove extra whitespaces
Restore dotted list evaluation on REPL

```CL-USER> '(1 . 2)``` evaluates to error on JSCL REPL.

That's mainly because when compiler tries to ```dump-cons``` dotted list,
it calls ```copy-list```, while ```copy-list``` doesn't support dotted
list in JSCL for now.
Merge pull request #151 from jnjcc/master

Restore dotted list evaluation on REPL
Add jnjcc to the CREDITS file
Remove extra whitespaces
Restore CONS evaluation on REPL

'CL-USER> (cons 1 2)' evaluates to error, too.

JavaScript EVAL interprets curly braces of object literals as
markers of a block of code. We avoid this by wrap object literals
within a pair of parens.
Restore CONS evaluation on REPL by tweaking js-stmt

thanks to davazp
Merge pull request #153 from jnjcc/master

Restore CONS evaluation on REPL by tweaking js-stmt
Merge branch 'master' into gh-pages
Compile latest version