Introducing TCanvasPainter for web canvas. From Sergey Linev!

core/base/v7/inc/ROOT/TDrawable.hxx

graf2d/gpad/CMakeLists.txt

graf2d/gpad/inc/LinkDef.h

graf2d/gpad/v7/inc/ROOT/TCanvas.hxx

graf2d/gpad/v7/inc/ROOT/TVirtualCanvasPainter.hxx

graf2d/gpad/v7/src/TCanvas.cxx

gui/canvaspainter/CMakeLists.txt

gui/canvaspainter/v7/src/TCanvasPainter.cxx

hist/hist/inc/LinkDef.h

hist/hist/v7/inc/ROOT/THistDrawable.hxx

hist/histpainter/v7/src/THistPainter.cxx

tutorials/v7/draw.cxx