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

Editor/Editor_VS2017.vcxproj

@@ -25,7 +25,6 @@
   <ItemGroup>
     <ClInclude Include="Button Defines.h" />
     <ClInclude Include="Cursor Modes.h" />
-    <ClInclude Include="Editor All.h" />
     <ClInclude Include="Editor Callback Prototypes.h" />
     <ClInclude Include="Editor Modes.h" />
     <ClInclude Include="Editor Taskbar Creation.h" />