ticket:10946: clarify uscript_getName() & uscript_getShortName()

git-svn-id: http://source.icu-project.org/repos/icu/icu@36292 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10889: test & fix u_charFromName(U_EXTENDED_CHAR_NAME) underflow crash

git-svn-id: http://source.icu-project.org/repos/icu/icu@36293 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10608: document udata alignment requirements

git-svn-id: http://source.icu-project.org/repos/icu/icu@36295 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10883: UTS 46 toUnicode set error for empty label including just xn--

git-svn-id: http://source.icu-project.org/repos/icu/icu@36297 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11173: my branch for cldr26 integration work

git-svn-id: http://source.icu-project.org/repos/icu/icu@36298 251d0590-4201-4cf1-90de-194747b24ca1