init
task folder stuff
c++: dir and json stuff
matlab: add jsonlab
good for vtkplotpoint
use QTime to replace std::time
can generate a handle per msec  (vs 1 handle per sec)
fix a bug (stattime - endtime > 1  to >=)
setup code style
update vtkshowvolume
update vtkshowimage
can show 3D image, but crashes on 2D image
add TaskHandler::GetQVtkFigurePointer(quint64 FigureHandle)
add TaskHandler::CreateQVtkFigure(QVtkFigure** Figure, quint64* FigureHandle)
add polymesh stuff
matlab: vtkplotpolymesh
good for point image polymesh
vtkshowpolymesh is ok now
make vtkshowpolymesh vtkshowtrianglemesh fast by using binary data files
show mesh in color
name style
add vtkshowsliceofvolume and vtkshowaxes
add vtkplotline