ticket:10268: Generate code for MeasUnit.h

git-svn-id: http://source.icu-project.org/repos/icu/icu@34884 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10574: part 1, just API and setContext/getContext implementation

git-svn-id: http://source.icu-project.org/repos/icu/icu@34886 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10619: Improve usability of DateFormat's leniency control & promote BooleanAttribute control to draft for v53

git-svn-id: http://source.icu-project.org/repos/icu/icu@34888 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8464: Implement Andy's comments.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34891 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10268: Test out MeasureUnit code so far.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34892 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10268: Add more tests for MeasureUnit.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34893 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10268: Fix TimeUnit to interroperate with MeasureUnit and added test.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34894 251d0590-4201-4cf1-90de-194747b24ca1