#CRA-558
#CRA-726, #CRA-558
Merge branch 'CRA-505' of https://github.com/CRAVA/crava into CRA-505

Conflicts:
	src/avoinversion.cpp
	src/avoinversion.h
#CRA-727 Correlations
#CRA-727 The estimated prior autocovariances are no longer assumed to be symmetric in each time lag.
#CRA-727 Prior autocovariance positive definite
#CRA-727
Merge branch 'CRA-505' of https://github.com/CRAVA/crava into CRA-505

Conflicts:
	src/blockedlogscommon.cpp
#CRA-727
#CRA-727
Merge pull request #149 from enesvold/CRA-505

Cra 727