[patch] Break limitation of file watchers for KDirWatch on Windows

[Jaroslaw Staniek]

For review (trunk).

Maximum number of wait objects per single QFileSystemWatcher is 
MAXIMUM_WAIT_OBJECTS (64) on Windows.

Attached implementation of KFileSystemWatcher. It's a typedef for 
QFileSystemWatcher, except on Windows, where we allocate more 
QFileSystemWatcher instances on demand (and deallocate them too).

The improvement, if makes sense, could be later included in Qt.

-- 
regards / pozdrawiam, Jaroslaw Staniek
  Sponsored by OpenOffice Polska (http://www.openoffice.com.pl/en) to work on
  Kexi & KOffice (http://www.kexi.pl/en, http://www.koffice.org/kexi)
  KDE Libraries for MS Windows (http://windows.kde.org)
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