Add xgrid/ygrid params for 2D data, which will be used for non-linear spacing
Allow contours to use xgrid/ygrid
Fix image with new Dataset2D
Add python implementation of image rescaling
Implement linear resampling in C++
Get rid of caching in Image widget to simplify
Fix clipping of images with grid
Fix data edit dialog
Simplify indexes for data edit. Fix VectorField widget.
Fix 2D dataset expressions
Better document 2D import in manual
Crop image to bounding box of plot
Manual updates
Merge branch '2d-dataset-extend' of github.com:jeremysanders/veusz into 2d-dataset-extend
Dialog changes
Add xgrid/ygrid params for 2D data, which will be used for non-linear spacing
Allow contours to use xgrid/ygrid
Fix image with new Dataset2D
Add python implementation of image rescaling
Implement linear resampling in C++