ENH: Remove unused and outdated tcl scripts.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23688 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: Remove unused code from vtkSeedTracts

Extent from the input tensor field was not used.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23689 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Re-organize tractography seeding pipeline to work with VTK6. See #3845

This commit fixes pipeline incorrectly setup in r23121 by using output
port instead pipeline information (InputROIPipelineInfo)

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23690 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: Remove commented code from Tractography seeding modules

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23691 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Do not set workaround to associate scalar with input tensor field.

This is not required when using VTK6.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23692 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Simplify Diffusion tensor reader using FindPoint with both VTK 5 and 6

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23693 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Fix return value in diffusion tensor reader "RequestData()"

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23694 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Update diffusion tensor reader to force origin/spacing. Fixes #3845

This commit fixes a regression introduced in r23122 and forces the
origin/spacing for VTK 6 similarly to what was done for VTK 5.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23695 3bd1e089-480b-0410-8dfb-8563597acbee