Merge pull request #170 from hgolsen/master

CRA-751: Multizone background in estimation mode
CRA-748 Include porosity logs
Merge pull request #172 from ulvmoen/master

CRA-748 Include porosity logs
CRA-749, CRA-738: Added logs_to_be_blocked to Blocked logs for rock physics. Added some static casts from size_t to int.
Merge branch 'master' of git://github.com/CRAVA/crava into CRA-738
CRA-738: Disabled trend cubes for multiple intervals. Added several static casts. Small bug fix.
CRA-505, CRA-660: Fixed issue with blocked logs common for multizone. Re-added function FindXYZForVirtualPart. Fixed bug with parseCorrelationDirection.
CRA-505: Small bug fixes. Added static casts.