ticket:10458: Get rid of unneeded QuantityFormatter::format method since NumberFormat can be implicitly converted to NumberFormatter.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35330 251d0590-4201-4cf1-90de-194747b24ca1
ticket:4833 Update RBBI title case rules, replace obsolete rule syntax.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35333 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10458: Carry NumberFormat optimizations over to RelativeDateTimeFormatter.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35334 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10724: Minor refinement in the API doc for TimeZone::getDisplayName, the fallback format is localized and can be different from GMT[+-]hh:mm.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35336 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10625 address data checks in DateFormatTest::TestDateFormatLeniency not checking expected results

git-svn-id: http://source.icu-project.org/repos/icu/icu@35340 251d0590-4201-4cf1-90de-194747b24ca1