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/trunk@35018 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Attempt to fix broken build.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@35019 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Attempt to fix broken build.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@35022 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Tempalte->SimplePatternFormatter. evaluate -> format

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@35027 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10646: Add test for 2 and 3 arg versions of format. Add test for if appendTo is not empty.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@35028 251d0590-4201-4cf1-90de-194747b24ca1