Changes for Qt/CE 4.2.x "Ping" release.

****************************************************************************
*                           Features                                       *
****************************************************************************

- Added QtNetwork

- Added QFEATURES system

- Added more examples/demos

- configure.exe
    * additions for QFEATURES

- Native look and feel
    * click&hold opens context menu
    * only allow single application launch, second startup changes to running instance
    * added experimental Windows CE 6 support

****************************************************************************
*                           Bug fixes                                      *
****************************************************************************

- qmake
    * fix Visual Studio project file generator for THUMB instructions

- Styles
    * removed big icon images to reduce library sizes

- QColorDialog
    * fix size issues for Windows CE

- QDebug
    * fix multiple output of lines when using Visual Studio

- QFile
    * fix creation/resolving links

- QFontDatabase
    * fix bug for multiple system fonts available on device

- QFontEngine
    * fix alignment issues for line edits

- qgetenv/qputenv
    * fix memory leak

- QLocale
    * fix timezone issues regarding standard SDK.

- QMessageBox 
    * fix OK button bug

- QSessionManager
    * fix id creation

- QTabWidget
    * fix positioning bug

- QWidget
    * fix size related bugs
    * fix window-animation when switching between menus (WindowsCEStyle)

- QWindowsCEStyle
    * various fixes

- QWindowsMobileStyle
    * smartphone fixes

- winmain module
    * fix leak