* tests
  Stages `build' and `test' reinstated and working.
* Dockerfile
  Tweaks to make testing using `test' command operational.

Also, adapt code affected by this elsewhere.

* shiny-state.R (which_gui_inputs, which_metfrag_inputs,
unpack_app_state, unpack_app_state_metfrag, input2conf_metfrag,
input2conf, app_state2state): Updated. The inputs are defined
in a more structured manner and this resulted in having to update
the entire system of state creation fom GUI.

* shiny-ui-base.R : Updated. Temporary reorganisation while the
app.Rmd is being rebuilt.

* state.R(metfrag_param): New function. Creates MF parameter object.
(metfrag4conf): New function. Creates a conf entry.
(metfrag_conf): Updated.

* inst/rmd/app.Rmd: Under reconstruction.

* app_config_and_status: Updated. Replaced metfrag controls with inject_inputs.

* inputs_metfrag: New file.

* app_results_explorer_cindex: New file.

* app_results_explorer_cindex_controls: New file.

* inst/rmd/app_compound_lists_and_sets: New file.