I18N :
    - portlet should return the last published but in the right portal language 
      (if there is no poll translation -> take user choice ; default or hidden)
    - same for template of all polls
    - vote for a poll in i18nLayer should affect all other poll in i18nLayer

New types of polls may be interesting (Idea from http://www.apwiz.com/flexivote.htm):
* open poll lets you see results before voting
* in a blind vote you must vote first, but can see all details
* In private poll you see results but not how people voted
* In a secret vote only the owner can see results and voting pattern.

[Done-2003-10-13]

 * Fix anonymous users vote: currently, there's only ONE cookie that is set for a whole site,
   ie. a user will be able to vote only ONE poll on a website, even if the website has several
   distinct polls.

 * The anonymous tracking consumes very much ZODB resources (ie. a lot of writing), leading
   to conflict errors. The fact of simply VIEWING a poll (including in the slot) consumes a transaction.



