Reconstruction - Apply a reconstruction-method on multi shell data destroy original dwi structure

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For the methods:
Solid Angle
ADC-Profile
Raw Signal Only
Standard
Numerical

Reconstruction methods are manipulating the GradientenDirectionContainer of the DiffusionImage.

All ReconstructionFilters should get the GradientenDirectionContainer as a const pointer and create a copy of it.

This touches in all Filters the SetGradientImage method.

Main Problem: Single-Shell-Filters normalize the gradient-length of the diffusion image.

The behaviour was also observed in the TensorReconstructionFilter.

New remote branch pushed: bug-15414-ReconstructionManipulatingGradientLengthOfDwi

[ffd0ea]: Merge branch 'bug-15414-ReconstructionManipulatingGradientLengthOfDwi'

Merged commits:

2013-06-27 14:01:52 Jonas Cordes [93b6ec]
fix other tensor reconstructionfilter call

2013-06-27 13:56:36 Jonas Cordes [ce1290]
in case of tensor reconstruction and cause the filter is 3rd party the copy was created bevore passing it to the filter

2013-06-27 13:41:18 Jonas Cordes [8b2caf]
all reconstructionfilters now get a const pointer of the gradientdirectioncontainer and create a copy of it

Merged into diffusion release branch. release_fix+