replace data::getCommonSource by util::getRootPath
make PropertyValue usable in sorted containers and add specialized setValueAs for const char* (stores as std::string)
add SortedChunkList::forall
make Image::getCommonSource and Image::identify available on non-indexed images
Merge branch 'api_change' into c++11

Conflicts:
	lib/Core/CoreUtils/common.cpp
	lib/Core/DataStorage/common.cpp
cosmetics and add withdate-option to identify
make dicom-plugin look for other PixelSpacing tags
Merge branch 'api_change' into c++11

Conflicts:
	lib/Core/DataStorage/image.cpp
	tools/isisdiff.cpp