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

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*                           Features                                       *

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- 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

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*                           Bug fixes                                      *

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- 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