CRA-543 Estimate variables in the bounding model

Has not been tested, as well->getPorosity(dymmy) not can be implemented before multizone inversion is ready.
CRA-562 Include trend parameters s1 and s2 in BlockedLogsForRockPhysics
CRA-563 Variables in the rock physics models should not be estimated in 4D
CRA-534: 2D interpolation almost complete.
CRA-534: Fixed merging conflicts.
CRA-534: Some small changes to 2D interpolation and fixed Makefile under Ubuntu.
CRA-534: Some small changes to 2D interpolation and included WriteToFile() in the class DistributionWithTrendStorage.
CRA-534: Some small changes in 2D interpolation.
CRA-624 Initiate push down data
Not included in merge
Merge branch 'master' of https://github.com/CRAVA/crava
Merge branch 'CRA-624'
CRA-626 Invert push down data in 1D profiles
Merge branch 'master' of https://github.com/CRAVA/crava
CRA-534: Include methods for 1D trend and variance estimation.
CRA-534: Some small changes and comments.
CRA-534: Some updates and comments to the CRAVA_user_manual.tex.
Merge pull request #49 from okATnr/master

CRA-606: Function for updating state4D  from posterior of one of the par...
Merge branch 'master' of https://github.com/CRAVA/crava
Merge pull request #51 from okATnr/master

CRA-606: minor bugfix, and removed trailing white space in code.