Changed direct access to struct WellControls to rather use well_controls_get_xxx() api.
Changed direct access to struct WellControls to use well_controls_get_xxx() api. NB: Do check the calls to well_control_iget_distr().
Changed to use well_controls_get_current_distr().
Merge pull request #73 from joakim-hove/use_well_controls_api

Use well controls api
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate