New REM client: the native client in EXE (REM-Client 47231ba)

freelancer.exe and the engine DLLs of the native REM client with RemGfx,
rem.ini / remgfx.ini, DACOM.INI with the REM effect pools; content.dll in
DLLS/BIN. The REM text and resource DLLs and the new-character files stay
the mod's. Removed: REM-Client.dll, FLAR, ReShade, dinput8 and the remaining
HUD / gameplay plugins (native now), ServerFramework.dll and CheatMessage.txt
(server). Material data: FLARDATA (RemGfx reads it). Updated with
REM-Client tools/rem/update_mod.py.

EXE/freelancer.ini

@@ -53,7 +53,7 @@ DLL = Content.dll, AISandbox, BELOW_NORMAL
 DLL = Content.dll, TestAutomation, BELOW_NORMAL
 DLL = Content.dll, BasePop, LOWEST
 
-DLL = callsign.dll, player 1 1-1
+;DLL = callsign.dll, player 1 1-1  ; REM: plugin not in the rebuild yet
 
 [Resources]
 DLL = InfoCards.dll ; Contains all infocard text resources