Let's start with implementing the base architecture for UTF8 caller ID's

Let's start with implementing the base architecture for UTF8 caller ID's
so we can handle multiple formats properly. This is not carved in stone,
but a proposal to start with.

We need to add support for transliterations as well as UTF8 handling,
propably with libiconv. Murf is looking into that for the dialplan.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89531 65c4cc65-6c06-0410-ace0-fbb531ad65f3