Adds Estonia to the Eurozone.
Adds Estonia to the Eurozone.

This resolves an issue submitted to the project tracker at
http://sourceforge.net/tracker/?func=detail&aid=3427878&group_id=274452&atid=1166262

fengshao0907/joda-money,fengshao0907/joda-money,JodaOrg/joda-money,JodaOrg/joda-money