ticket:10128: update ICU to Unicode 6.3 beta (merge from branches/markus/uni63 at r33661)

git-svn-id: http://source.icu-project.org/repos/icu/icu@33662 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10017: Rejected proposal for adding TimePeriod constructors.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33664 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10017: Rejected proposal to add constructors to listFormatter.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33665 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10017: Rejected proposal to remove formatTimePeriod from C++ TimeUnitFormat.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33666 251d0590-4201-4cf1-90de-194747b24ca1