2-3tree 暂时只有插入算法，经过严格测试，算法可读性非常强-2-3tree for the time being only the insertion algorithm, after rigorous testing, the algorithm is very strong readability

23tree的完整实现，提供了网上找不到的删除算法，严格测试，可读性较差。删除如有bug请与作者联系。-23tree complete, providing an online algorithm can not find the deletion, rigorous testing, poor readability. Remove any bug, please contact the author.