the tables contain character constants like ('รค') that are supposed to
be interpreted as ISO8859-1 or WINDOWS-1252 or sth, but that doesn't
seem to work with MinGW (anymore) - seems like it assumes UTF-8 by
default, and for some reason -finput-charset=ISO8859-1 doesn't help
either, it complains about multichar character constants then..
Anyway, now the table entries are represented as the corresponding
integer constants which seems to work as intended.
Fixes#238
Sys_GetScanTable() and MapKey() are only used by the Windows backend
or the Windows-only tools.
Rename to Win_GetScanTable() and move MapKey() as Win_MapKey() to
win_input.cpp.
Don't include the lazy precompiled.h everywhere, only what's
required for the compilation unit.
platform.h needs to be included instead to provide all essential
defines and types.
All includes use the relative path to the neo or the game
specific root.
Move all idlib related includes from idlib/Lib.h to precompiled.h.
precompiled.h still exists for the MFC stuff in tools/.
Add some missing header guards.
