Add support for .ini file,

Add support for extended messages (advanced protocol),
Add handy command lines for Power, Volume in db, and Mute.

AVR Working Controller/AVRInterface.h

@@ -54,7 +54,7 @@ public:
 		subZone1,
 		subZone2,
 		subZone3,
-		subSubsystemCount
+		subsystemCount
 	} AVRSubsystem_T;
 
 	typedef enum {
@@ -249,7 +249,8 @@ public:
 	/// @param[in] function : Power, Speaker, Volume, etc.
 	/// @param[in] arg: on/off, etc.
 	/// @param[in] variableData is for those functions where it needs to integrate variable value, such as setting the volume directly
-	/// @return 
+	/// @return true if accepted
+	///
 	bool AVRCommand(AVRSubsystem_T subsystem,
 		AVRFunction_E function,
 		AVRArg_T arg,
@@ -316,7 +317,22 @@ public:
 	/// 
 	/// @brief Export all the numeric data to support a command line control option
 	///
-	void ExportInformation();
+	/// @param[in] subsystem: Main | Zone 1 | Zone 2 | Zone 3
+	/// @param[in] function : Power, Speaker, Volume, etc.
+	/// @param[in] arg: on/off, etc.
+	///
+	void ExportInformation(AVRInterface::AVRSubsystem_T subsystem = subsystemCount,
+		AVRInterface::AVRFunction_E function = fncFunctionCount,
+		AVRArg_T arg = eARGCount);
+
+	/// VolumeDBtoAPIValue
+	/// 
+	/// @brief Convert a floating point value to the internal API db units for volume
+	/// @param db in the range of -80.0 to +16.5 db
+	/// @return scaled to internal volume units
+	/// 
+	uint8_t VolumeDBtoAPIValue(float db);
+
 
 private:
 	uint32_t sentAtTime_ms;