NORM_IGNORESYMBOLS in string mapping mode.

- added support for ColorKeying during blits
- miscellaneous fixes

MZ_SUPPORTED definition was missing). Added a simple handler for
direct console input, which needs to be improved.

-debugmsg +win32.

RegSetValue.

incomplete values before (the first 2 chars where cut away).

-debugmsg +relay or warn+relay. Suggested by Juergen Schmied.

the focus from the focus window; ShowWindow with SW_HIDE does.
So move the code that does this from SetWindowPos to ShowWindow.

trace message fix
temporary "fix" for Linux's coarse timer resolution

Implemented the Class object registration mechanism.

features of this implementation are:
- Can open storages created in Windows.
- Can create new storages that the windows libraries can
  read.
- Provides all the functionality to create/open/remove and
  rename streams and storages inside the main storage object.

through a function pointer instead. Added a few traces. Fixed the
"Memory corruption !" message in DGA mode. Commented out an
unnecessary TSXF86VidModeSetViewPort that caused my X server to
act up, relying on TSXF86DGASetViewPort instead.

- Better unicode support (only defines, currently)
- Drag & drop implemented.
- LPSTR_TEXTCALLBACK should work now.
- First start at custom draw code.

WM_XBUTTONDOWN matches the message. In X, the keystate is changed
after the message is processed.  In Windows, it is changed before.

SetFileAttributes32A changed to make file writeable when
FILE_ATTRIBUTE_READONLY is not set.

query installed (win32) compressors. Started on AVIFILE support.