Feature: Script API to change town rating of companies

src/command_type.h

@@ -262,6 +262,7 @@ enum Commands {
 	CMD_DO_TOWN_ACTION,               ///< do a action from the town detail window (like advertises or bribe)
 	CMD_TOWN_CARGO_GOAL,              ///< set the goal of a cargo for a town
 	CMD_TOWN_GROWTH_RATE,             ///< set the town growth rate
+	CMD_TOWN_RATING,                  ///< set rating of a company in a town
 	CMD_TOWN_SET_TEXT,                ///< set the custom text of a town
 	CMD_EXPAND_TOWN,                  ///< expand a town
 	CMD_DELETE_TOWN,                  ///< delete a town