of (M*3,). New gifti module for basic gifti surface support.

labels - failing when trying to load a label file with no noise components.

voxToWorldMat is changed.

xform. Transform module has new flirtMatrixToSform function which
turns a FLIRT matrix into a src -> struc sform transformation.

returning/assuming transposed affines (column-major). This is because that's
what OpenGL uses.

when it is. New functions in transform module.

EVs

0. AtlasRegistry is no longer thread-safe. It was causing too much
   trouble, and loading atlas descriptions is not a bottle neck anyway,
   so it's completely unnecessary.

1. AtlasDescriptions are now stored as a sorted list.

2. All atlases (including those in $FSLDIR) are saved.

3. More AtlasRegistry methods to rescan, check, and remove atlases.

Little bugfix in Notifier - calling skip/enabled methods with no listeners
registered would result in error.

dimensionality

changed data.

identifying reference image associated with a FIRST vtk file.

space as another.

the default file extensions (i.e. the FSLOUTPUTTYPE) - this is used by
the fslpy_immv/imcp command line scripts.

appropriate extension

dictionary. Intead, they use 'file groups', which is conceptually much
easier to understand. New functions splitExt and getFileGroup.

Also added imcp and immv functions, which perform the equivalent of the
FSL imcp/immv scripts (but are more general).

previous commit.

scaling on partial model fits. Also added new method
isFirstLevelAnalysis.

sorted eigenvalues. I do not understand numpy indexing.

dtifit.py. Added new function, decomposeTensorMatrix, which turns a 6
volume tensor matrix image into eigenvalue and eigenvector images.

readbuf size, despite profiling showing that it doesn't make much
difference.