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

Tactical/DisplayCover.cpp

@@ -1,11 +1,3 @@
-#ifdef PRECOMPILEDHEADERS
-	#include "AI All.h"
-	#include "DisplayCover.h"
-	#include "Interface.h"
-	#include "opplist.h"
-	#include "_Ja25Englishtext.h"
-	//#include "Ja25 Strategic Ai.h"
-#else
 #include "builddefines.h"
 #include "Types.h"
 #include "Isometric Utils.h"
@@ -35,7 +27,6 @@
 #include "soldier profile type.h"
 #include "Interface Cursors.h"	// added by Flugente for UICursorDefines
 #include "Rebel Command.h"
-#endif
 
 //forward declarations of common classes to eliminate includes
 class OBJECTTYPE;