Removed whitespace, vars, saved 2 bytes in gzip

Removed duplication of vars and other code cleanup

Fixed minor issues with whitespace based on @Krinkle notes

Also saved more bytes when gzipped, it is now 696 bytes - a 2 byte saving! :)

   raw     gz Sizes
  1298    698 jquery.cookie-old.js
  1295    696 jquery.cookie.js
Merge branch 'master' of github.com:t0mtaylor/jquery-cookie