Update namespace and build docs

NAMESPACE

@@ -135,10 +135,12 @@ export(get_hist_tool)
 export(get_hist_total)
 export(get_hist_transition_matrix)
 export(get_hist_virus)
-export(get_n_parameters)
+export(get_mean_params)
+export(get_mean_stats)
+export(get_n_params)
 export(get_n_replicates)
 export(get_n_samples)
-export(get_n_statistics)
+export(get_n_stats)
 export(get_n_tools)
 export(get_n_viruses)
 export(get_name)
@@ -147,12 +149,10 @@ export(get_name_virus)
 export(get_ndays)
 export(get_network)
 export(get_param)
-export(get_params_mean)
 export(get_reproductive_number)
+export(get_sample_stats)
 export(get_state)
 export(get_states)
-export(get_statistics_hist)
-export(get_stats_mean)
 export(get_today_total)
 export(get_tool)
 export(get_transition_probability)
@@ -199,8 +199,8 @@ export(set_name)
 export(set_name_tool)
 export(set_name_virus)
 export(set_observed_data)
-export(set_par_names)
 export(set_param)
+export(set_param_names)
 export(set_prob_death)
 export(set_prob_death_fun)
 export(set_prob_death_ptr)
@@ -215,7 +215,7 @@ export(set_recovery_enhancer)
 export(set_recovery_enhancer_fun)
 export(set_recovery_enhancer_ptr)
 export(set_simulation_fun)
-export(set_stats_names)
+export(set_stat_names)
 export(set_summary_fun)
 export(set_susceptibility_reduction)
 export(set_susceptibility_reduction_fun)