Bug 849710 - Move SVGFEComponentTransferElement to its own file r=Ms2ger

--HG--
rename : content/svg/content/src/nsSVGFilters.cpp => content/svg/content/src/SVGFEComponentTransferElement.cpp
rename : content/svg/content/src/nsSVGFilters.cpp => content/svg/content/src/SVGFEComponentTransferElement.h
Bug 849710 - Convert SVGFEComponentTransferElement to WebIDL r=Ms2ger