Bug 827119: Move SVGSVGElement to mozilla::dom r=bz

--HG--
rename : content/svg/content/src/nsSVGSVGElement.cpp => content/svg/content/src/SVGSVGElement.cpp
rename : content/svg/content/src/nsSVGSVGElement.h => content/svg/content/src/SVGSVGElement.h
Bug 827119: Convert SVGSVGElement to WebIDL r=bz
Bug 824218 - Remove unimplemented SVG features r=longsonr
Bug 828169 - Don't use nsIDOMNode in editor transactions r=ehsan
Bug 824253 - Intermittent browser_cmd_screenshot_perwindowpb.js; r=ehsan
Fix a review comment for bug 827119, r=bz, DONTBUILD