0.07    2016-10-10/15/
        some changes of inner functions 
0.05    2016-10-08/16/
        Add a array  storage YI data to avoid only can  access one info once.
0.03    2016-09-24/22
        Add YIdb to module's _DATA_ 
0.01    2016-09-24/15
        First version, released on an unsuspecting world.