lock up (as thousands of TaskThreads were being created, and not destroyed)

block until queue is empty. ImageWrapper has method to access TaskThread. This
is primarily used for testing threaded access to ImageWrapper.

which is primarily for testing.

exists. I hope this doesn't break anything.

was hoping.

interface

Used by new gifti function relatedFiles

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

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.

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