Adjustment of second module

[jinyangustc]

Create a new class "GRN". And repeal class "Alignment" for simplicity. Hence the second module has two class: Sequence and GRN. The input of second module are:

1. Old GRN correlation matrix; 2.The matrix size;
2. Sequence array of all old gene plus the new one. The output of second module is:
3. New GRN correlation matrix.