Generate per-language translation sources (#806)

This generates dedicates Translation.cpp files for translation language
and derives all language-specific data from them.

The Makefile is extended to also take care of generating these source
files.
This allows reuse of nearly all object files between builds of different
languages for the same model and regenerating the translation sources if
necessary.
This speeds up the release builds and the normal write-compile-cycle
considerably.
It also eliminates miscompilations when manually building different
languages.

source/Core/Inc/Settings.h

@@ -9,9 +9,8 @@
 
 #ifndef SETTINGS_H_
 #define SETTINGS_H_
-#include "unit.h"
 #include <stdint.h>
-#define SETTINGSVERSION (0x24)
+#define SETTINGSVERSION (0x25)
 /*Change this if you change the struct below to prevent people getting \
           out of sync*/
 
@@ -37,9 +36,7 @@ typedef struct {
                                  // down screen until its <50C
   uint8_t detailedIDLE : 1;      // Detailed idle screen
   uint8_t detailedSoldering : 1; // Detailed soldering screens
-#ifdef ENABLED_FAHRENHEIT_SUPPORT
   uint8_t temperatureInF : 1; // Should the temp be in F or C (true is F)
-#endif
   uint8_t descriptionScrollSpeed : 1; // Description scroll speed
   uint8_t lockingMode : 2;            // Store the locking mode
   uint8_t KeepAwakePulse;             // Keep Awake pulse power in 0.1 watts (10 = 1Watt)