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