- Move all MSVC pragma into config-digikam.h. If new ones needs to be add in this future, please use this common place.
No need to patch all source code with M$ pragma rules

- Script interface still experimental and uncomplete. I add anew Cmake option to compile all code relevant.
It disabled by default. We need to find a new contributor to finalize this implementation in the future,
to be able to use it in production (for next GSOC 2012 ?)