ticket:10877: Create ICU4C branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35725 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10877: Add word weights to Thai dictionary.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35726 251d0590-4201-4cf1-90de-194747b24ca1