change some ascii logic, reduce source code size, redo some functions and add another way to save rdsmodulator data (this one needs both enc and mod data refresh)

src/modulator.h

@@ -9,6 +9,13 @@ typedef struct
 	uint8_t rdsgen : 2;
 } RDSModulatorParameters;
 
+typedef struct
+{
+	uint8_t check;
+	RDSModulatorParameters params;
+	uint16_t crc;
+} RDSModulatorParametersFile;
+
 typedef struct
 {
 	uint8_t symbol_shift: 7;