ERT 791: Fixed name error: well_info_iget_state_from_report -> well_info_iget_state
ERT-791: Prepended enum values in well_type_enum with ERT_ to avoid name clash with opm-core
ERT-791: Write wellinfo to restart files
Merge pull request #661 from chflo/ERT_791_restart_file_wellinfo

Ert 791 restart file wellinfo