Use UTF8 (byte)length instead of character length.
Add the util test to OSX Tests as well.
Merge pull request #613 from realm/lr-os-fixing-utf-8

Use UTF8 (byte)length instead of character length.
Fix a small regression in examples testing
Merge pull request #614 from realm/ez-example

Fix a small regression in examples testing
Merge branch 'master' of https://github.com/realm/realm-objc into al-standalone-subscript
fixed changelog