Started to implement account history.

src/db/_securities.rs

@@ -87,6 +87,17 @@ impl Security {
     }
 }
 
+impl Clone for Security {
+    fn clone(&self) -> Self {
+        Security{
+            id: self.id,
+            security_type: self.security_type.clone(),
+            symbol: self.symbol.clone(),
+            name: self.name.clone(),
+        }
+    }
+}
+
 pub struct NewSecurity {
     pub security_type: SecurityType,
     pub symbol: String,