1.0 (2014.5.12)
===============
1. Add Complete document

0.7 (2014.5.5)
==============
1. Add a class, Status, to store all sudoku's global variables
2. Add a function, init(), to init the Status's variables
3. Change all code that using global variable to use Status.name["[var]"]

0.6 (2014.5.2)
==============
1. Fixed some source
2. Add the data path

0.5 (2014.4.27)
===============
1. First formal publish

0.0 (2014.4.27)
===============
1. Initial version
