[Development] new "debugsupport" module and API

[Ulf Hermann]

> Please don't. quick1 is especially usefull on platforms without any OpenGL.
> And quick1 can be built without qtdeclarative. Most of the current
> dependencies are optional, and even qtwebkit depending on qtdeclarative is
> artificial in qt.pro. qtwebkit certainly builds and runs without it in Qt
> 5.3.0-rc1.

Maybe we just shouldn't touch quick1 anymore for things like refactoring 
and cleanup. I'll leave it alone for now. You'll still be able to use 
the debug client with quick1 applications, of course.

regards,
Ulf