Add command results to b_list

Rename tostring -> toString in models
Add datasets names to b_main command help - validation

src/common/Datasets.cc

@@ -126,4 +126,14 @@ namespace platform {
     {
         return datasets.find(name) != datasets.end();
     }
+    std::string Datasets::toString() const
+    {
+        std::string result;
+        std::string sep = "";
+        for (const auto& d : datasets) {
+            result += sep + d.first;
+            sep = ", ";
+        }
+        return "{" + result + "}";
+    }
 }

src/common/Datasets.h

@@ -24,6 +24,7 @@ namespace platform {
         std::pair<torch::Tensor&, torch::Tensor&> getTensors(const std::string& name);
         bool isDataset(const std::string& name) const;
         void loadDataset(const std::string& name) const;
+        std::string toString() const;
     };
 };