Mdt

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Fixed an important bug in the code that was present since version 0.14.8. The noise std was not correctly set anymore in the log likelihood method.
All users are advised to upgrade to this version.

Fixed
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- Fixed the issue that the noise std was not set correctly due to naming issues in the log likelihood function.

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Changed
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- Updated the rotate orthogonal vector CL function. This reverts changes from a few versions ago, this gives the same value but faster and more stable.
- Work on moving local variable declarations outside of non-kernel functions. This should in the future allow running MOT on LLVM OpenCL implementations. More work needed.

Other
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- Speed-up of Tensor post-processing.
- Refactoring of the NODDI model.
- Removed the AxonDensity index from the AxCaliber models.

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Fixed
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- Fixes the issue that the models would not load.

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Fixed
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- Fixed the init user settings initialization for newer versions of Python.

Other
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- Following changes in MOT (changed the function signature of the Legendre Polynomial).

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Other
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- Update requirement to newer MOT version to fix NODDI computation overflow.

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- Small fix to make AxCaliber working again.