2009-04-15 version 0.8-0
  - much work done on visualization based on polyeders (faster)
  - included visualization of ODF and related (new class dtiqball)

2008-12-04 version 0.6-0
  - major update to include 3D visualization with rgl
  - included Rician bias correction
  - included non-linear regression tensor estimation
  - implemented print(), summary(), show(), extract() on all classes

2008-10-07 version 0.5-6
  - new function readDWIdata reads DWI data from directories with imaging files (DICOM,NIFTI,AFNI,ANALYZE)
  - documentation now consistent with S4-documentation

2008-01-21 version 0.4-0

  - plot() on dtiIndices has new argument view for axial, sagittal, coronal view
