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

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

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@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/trunk/source@36297 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10970: Support required decimal point

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@36300 251d0590-4201-4cf1-90de-194747b24ca1