percolation v1.1 beta
use StdIn.getInt to acquire input
Percolation: 
Refactor the index i and j from 0~N-1 to 1~N
Add unit test and readjust the row and column order in function parameters
add unit test
percolation feature is done
Refine Percolation
Merge branch 'feature/percolation-v1.1' into develop
Merge remote-tracking branch 'origin/develop' into develop