Merge branch 'develop'
TODO: decoding_mdr_I_recover()
some bugs in mdr_I_recover_oneStripeGroup()
fix bugs
when k is large, there are still some bugs in mdr_I
Merge branch 'feature' into develop
Merge branch 'develop'
when k is large, it would be broken. the reason of this bug is that the type of each element in  encoding_matrix is 'long long', it is not large enough because 2^k is more larger
Merge branch 'master' into develop