ticket:10815 Regex error handling, minor cleanups.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36306 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11173: CLDR tags/release-26-d01 into ICU4C trunk with related test & lib code updates

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36313 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8951: BCP 47 key/type converter APIs merged from the work branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36320 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11173: CLDR tags/release-26-d02 into ICU4C trunk, fixes more ldml2icu conversion bugs

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36323 251d0590-4201-4cf1-90de-194747b24ca1
ticket:8951: Fix for a build error on Mac.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36326 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10898: tzdata2014g updates in ICU4C

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36329 251d0590-4201-4cf1-90de-194747b24ca1