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Changed many things, like pointers to osg::ref_ptr and locking changes.
However, I think what really fixed it was setting data variance to dynamic.
For discussion about this see OSGQSG chapter 3.2

- also see ticket #142

[FIX] some work on coordinate system and coordinate transformation, coordinate system module using dataSetAdded variable for update instead of textureChanged

[ADD] - proper exception handly in module threads

[CHANGE] add a pointer to WModule to dataset tree items, this way we can directly access the properties of a dataset in the datasetbrowser