Include all dual values reported by the solver

This commit modifies how duals are reported to the Output_Duals table.
Here, all the dual values as reported by the solver are reported directly.
Duals with an absolute value of less than 1e-5 are ignored.
Note that selecting this option through the config file can cause the output
database to increase in size.

temoa_model/pformat_results.py

@@ -116,8 +116,7 @@ def collect_result_data( cgroup, clist, epsilon):
 		supp_outputs_df = supp_outputs_df.loc[(supp_outputs_df != 0).any(axis=1)]
 		if 'Dual' in supp_outputs_df.columns:
 			duals = supp_outputs_df['Dual'].copy()
-			duals = -duals
-			duals = duals[duals>epsilon]
+			duals = duals[abs(duals)>1e-5]
 			duals.index.name = 'constraint_name'
 			duals = duals.to_frame()
 			if (hasattr(options, 'scenario')) & (len(duals)>0):