ticket:8464: Added COUNT value to end of each enum.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34670 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8464: Document how memory allocation errors of reference counter will be handled.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34671 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8464: Basic cache framework in place. Next need to populate with data from CLDR.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34672 251d0590-4201-4cf1-90de-194747b24ca1