2.3.2  2014-XX-XX
	- Supports Unicode 7.0.0.

2.3.1  2013-09-28
	- Supports Unicode 6.3.0.

2.3.0  2012-10-01
	- Supports Unicode 6.2.0.

2.2.0  2012-04-02
	- License Change:
	  From now on, sombok is distributed under dual license of GPL
	  *and* Artistic License.

2.1.0  2011-02-04
	- Supports Unicode 6.1.0.

2.0.5  2011-04-23
	- Bug Fix: Infinite loop occurs when prep_func generated very long
	  (> charmax) unbreakable line.
	- linebreak_prep_URIBREAK(): loosely refers RFC3986.

