ticket:10646: Introduce PluralTemplate class. Have RelativeDateTimeFormat use it.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35009 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Add documentation to PluralTemplate class.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35010 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Change PluralTemplate C++ class to match JAVA QuantityFormatter class.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35012 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Add internal ListFormatter::format method for MeasureFormat.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35016 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Merge r34990 to r35016 from trunk.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35017 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Introduce Template class and change ListFormatter to use it. Introduce QuantityFormatter class and change RelativeDateTimeFormatter to use it.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35018 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Attempt to fix broken build.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35019 251d0590-4201-4cf1-90de-194747b24ca1