iBatis for Java 2.3.4 发布

修正了2.3.3的几个BUG,经过几个星期没有负面报道，就把正式版发布出来了！
以下是修正与改正：

              Bug


[IBATIS-244] -         CLONE -configured type handler not used in insert

[IBATIS-512] -         specifying custom boolean typehandler doesn't include primitives

[IBATIS-522] -         NPE in TypeHandlerFactory.getTypeHandler() when type is null


   
        Improvement


[IBATIS-511] -         result to bean mapping: value should be included in exception message [patch included]

[IBATIS-515] -         Element comments for DTDs

[IBATIS-534] -         jdbc NULL to java int throw NullPointerException