probabilistic and labelled), and for label summary images

are created for Atlas subclasses.

from numpy arrays. AtlasPanel now allows showing/hiding of probabilistic
overlays, as well as binary label overlays.

display information for, and can show/hide label masks for individual
regions

Fixes to GLVolume/GLMask colour map creation in situations where the
image data only has a single value.

module, which exposes the data in $FSLDIR/data/atlases, and have
started working on an 'AtlasPanel', which will show the user region
information, and allow them to enable/disable regional/whole-atlas
overlays.

faster if you only need to look at the image header data.

undo/redo, as it otherwise causes multiple little updates to the
corresponding GL texture. Now is done with one big update after
undo/redo has completed.

option to 'replace current selection'.

of the selection, not a copy, so it was being corrupted by callers

single entity for undo/redo purposes.

separate undone/done stacks. Selection how has setSelection, and
replaceSelection, with the difference being that the latter clears
the selection first.

enabled/disabled with actions)

that OrthoEditProfile does not need mouseup listeners

index lists. Uses more memory, but is much faster. New annotation type,
'VoxelMask', which encapsulates a 3D binary mask texture.

GLImageObject, is now the superclass for GLVolume/Mask/Vector

- props.Colour is now RGBA, rather than RGB.

in editor/selection so they work with 4D images.

units. And leaving array/element buffers bound screws around with later
fixed-function pipeline logic.

vertex/fragment shaders.

MUL/ADD combinations with a single MAD call.

suppressed, its opacity is 0. New vector option to hide voxels where
the modulation value is below a specified threshold.

on Display instances. Only currently works for GL21.

I had inadvertently changed the order of vertex/index creation

glvector_funcs module, which has logic for both rgb mode and line
mode (this applies to GL14 and GL21 implementations). Not currently
working properly.

an option for vector line display (becuase interpolating vectors is a
non-trivial task). RGB mode texture is now stored as absolute values,
and line mode textures as (normalised) signed values - in order to allow
for hardware interpolation of RGB display, I have to store the vector
data as absolute.

is no longer recreated on changes to Display.interploation - just the
texture filtering method is updated.