ERT-387 - Add the special fields associated with the Ensemble Smoother

Removed files
ERT-387 - Add the special fields associated with the Ensemble Smoother

Added some icons
ERT-387 - Add the special fields associated with the Ensemble Smoother
Removed code that caused deprecation warning.
ERT-387 - Add the special fields associated with the Ensemble Smoother
Renamed function
ERT-387 - Add the special fields associated with the Ensemble Smoother
Updated tools
ERT-387 - Add the special fields associated with the Ensemble Smoother
Updated and new tests
ERT-387 - Add the special fields associated with the Ensemble Smoother
Added search highlighting
ERT-387 - Add the special fields associated with the Ensemble Smoother
Added argument types for a range string and proper names.
ERT-387 - Add the special fields associated with the Ensemble Smoother
Applied proper name argument type to a keyword
ERT-387 - Add the special fields associated with the Ensemble Smoother
Updated and new Ert models
ERT-387 - Add the special fields associated with the Ensemble Smoother
Updated widgets + the new error popup widget.
ERT-387 - Add the special fields associated with the Ensemble Smoother
Refactoring of the simulation page + new fields for the ensemble smoother.
ERT-387 - Add the special fields associated with the Ensemble Smoother
Several small fixes
ERT-387 - Add the special fields associated with the Ensemble Smoother
Missing CMakeLists entries
Merge remote-tracking branch 'upstream/master' into rearrange_gui
Merge pull request #266 from jepebe/rearrange_gui

ERT-387 Rearranged the Simulations Page