Changelog:
===========
- Fix XsdAttributeGroupProtocol
- Improve Unicode support with installable UnicodeData.txt versions
- Extend names disambiguation with a fix for issue
- Refactor tree builders to fix document position of tails
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
