More unused stuff removal (#49)

* More unused stuff removal

delete:
- giant 'metaheaders' (JA2 All.h, Laptop All.h, etc), preferring to add #includes directly where needed
- unused ExceptionHandling and DbMan translation units
- unused WizShare.h, Bitmap.h, trle.h, video_private.h headers

* remove mentions from vc proj files too

* remove preprocessor conditionals for unused definitions

find . -iname '*.h' -o -iname '*.cpp' -exec unifdef.exe -m -UPRECOMPILED_HEADERS -UJA2_PRECOMPILED_HEADERS -UWIZ8_PRECOMPILED_HEADERS -UPRECOMPILEDHEADERS {} ';'

then manually fixed a couple files the tool errored out on

* yes, the comments too

as title

Standard Gaming Platform/timer.cpp

@@ -1,8 +1,3 @@
-#ifdef JA2_PRECOMPILED_HEADERS
-	#include "JA2 SGP ALL.H"
-#elif defined( WIZ8_PRECOMPILED_HEADERS )
-	#include "WIZ8 SGP ALL.H"
-#else
 	#include "types.h"
 	#include <windows.h>
 	#if defined( JA2 ) || defined( UTIL )
@@ -11,7 +6,6 @@
 		#include "video2.h"
 	#endif
 	#include "timer.h"
-#endif
 
 #ifndef WIN32_LEAN_AND_MEAN
 	#define WIN32_LEAN_AND_MEAN