ticket:10864:DecimalFormat::getGroupingSize() to return 0 when grouping isn't being used.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@36027 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10864:DecimalFormat::getGroupingSize() to return 0 when grouping isn't being used.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@36028 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10979 add udat_adoptNumberFormat & update doc

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@36035 251d0590-4201-4cf1-90de-194747b24ca1