[all] Registers implementation started (make REGISTERS=YES)

[sky9x / gruvin9x] Date / Time setting splitted into 2 lines (General Setup Menu)
[sky9x] Baudrate moved to the Hardware screen
[sky9x / gruvin9x] SD Manager better implementation
[sky9x] Short / Long switch press used in Function Switches
[sky9x] Bg Music Pause / Resume

src/Makefile

@@ -193,6 +193,10 @@ CURVES = YES
 # Values = YES, NO
 XCURVES = YES
 
+# Registers
+# Values = YES, NO
+REGISTERS = NO
+
 #------- END BUILD OPTIONS ---------------------------
 
 # Define programs and commands.
@@ -360,6 +364,10 @@ ifeq ($(XCURVES), YES)
   CPPDEFS += -DXCURVES
 endif
 
+ifeq ($(REGISTERS), YES)
+  CPPDEFS += -DREGISTERS
+endif
+
 # If STD-Support is enabled
 ifeq ($(EXT), STD)
   CPPDEFS += -DEXTSTD