SCoT : added function to calculate autocovariance matrices.
SCoT : added function to calculate autocovariance matrices.


Former-commit-id: 29b93e3416f8b6d7439866e3256cbf466bac0ce1
cle1109/scot,scot-dev/scot,cbrnr/scot,scot-dev/scot,mbillingr/SCoT,cbrnr/scot,mbillingr/SCoT,cle1109/scot