screws with font colours on OSX (due to a bug in wx).

values are now displayed correctly

related tweaks to display space location preservation logic.

DisplayContext.location property is preserved when overlays move in the
display coordinate system (this commit accompanies a substantial re-work
in the props package - see props commit 2c48c43). The ModelOpts class
needs to be updated - coming in the next commit.

account GEDMode. An Editor instance is now created for each individual
Image overlay; the OrthoEditProfile manages multiple Editor instances,
and changes the displaySpace property whenever the selected image changes.

controlled with GEDMode). Unfortunately this means that spline
interpolation is no longer automatically switched on when image is moved
to affine space. Perhaps I can put some logic into the DisplayContext to
do this, or think of a more modular way of adding this behaviour in ...

header does not say that it's in MNI152 space.

'displaySpace' allows the user to control the Image transform for all
loaded image overlays, switching between 'world', 'pixdim', and the
space for a specified reference image.

toggled. Bet, feat, flirt tools now working.

elsewhere.

TimeSeriesControlPanel. The controls package is now fully
documented. Phew.

usable (previously was only usable when a compatible overlay was
selected). Next commit will have finished documentation.

continue to live in my local repository, until I migrate to gitlab issue
tracker.

LightBoxToolBar.

ClusterPanel, HistogramControlPanel, HistogramListPanel, and
TimeSeriesListPanel.

AtlasPanel.loadAtlas shows a dialog while atlas is being loaded.
Management of atlas overlays changed a bit - AtlasPanel now updates
AtlasOverlayPanel when an atlas overlay is manually removed by the user.

imports, and removed most dependencies on existence of controls/views
package level imports.

controls package first.