update:
1.4
抛弃mode参数，现在由程序自动选择mode1或者mode2，用户不用关心
There is no need for param:'mode' now; Automatically determine mode 1 or mode 2;
auto mode:
mode0(default): Universal structure (look like exceldata.dat)
mode1: Universal structure (look like syokibugu)
解决 idata.dat 不能解包的问题
Resolve the issue of idata.dat not being able to unpack