Merge remote-tracking branch 'hewenbin/master' into vortex
gen vortex detection
default vector size
VortexDetector
	new file:   Regular/Serial/convertCurvilinear.C
	new file:   Regular/Serial/readLabels.cpp
	modified:   VTK/examples/StreamlineRenderPlot3D.cpp
Minor performance fix
	modified:   VortexDetector.C
Add description
	modified:   ../../VTK/VectorFieldVTK.cxx
multiblock support (not tested)
	modified:   ../../VTK/examples/StreamlineSimpleVTK.cpp
Autodetect plot3d format
	modified:   ../../VTK/examples/vec2vti.cpp
	modified:   ../../renderer/examples/gcbStreamline.cpp
Drastically increase the color assignment speed
Merge branch 'vortex'

Conflicts:
	VTK/VectorFieldVTK.cxx
	src/Field.C
delete unused file
multiblock support. Use MultiBlockVectorFieldVTK class