ticket:10344 add new field for currency CASH/STANDARD Usage

git-svn-id: http://source.icu-project.org/repos/icu/icu@35778 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10458: Initial commit.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35783 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10778: Add test to ensure that MeasureUnit is backward compatible with ICU 53.1

git-svn-id: http://source.icu-project.org/repos/icu/icu@35784 251d0590-4201-4cf1-90de-194747b24ca1