ERT-609 - Remove measurements with a STD of 0
Merge pull request #492 from jepebe/ERT-609

ERT-609 - Remove measurements with a STD of 0
ERT-614: Created grid function ecl_grid_alloc_dxv_dyv_dzv_depthz() - for OPM.
Merge pull request #496 from joakim-hove/ERT-614-create-grid

ERT-614: Created grid function ecl_grid_alloc_dxv_dyv_dzv_depthz()
ERT-614: Minor fix for Windows compile.
ERT-611: Added ctime::inRange() metrhod.
ERT-611: Changed name of ctime class to CTime
ERT-602: Ensure that the ecl_rft date property is a Python datetime.date instance.