Progress on output-distribution based legends...not good yet.
Merge branch 'master' into guides
Merge branch 'master' into guides
Infrastructure for axes (axis descriptors threaded through most locations)
Drawing guide points...not correctly
Ticks and labels on X/Y...if the data is at the origin.
Rotating X axis (at origin)
Significantly improved rendering quality on labels.
Improved label placement...but sort of cludgy
Overall axis label on Y placement improved
Misc tweaks for defaults.
Layout tweaks
Cleanup imports
Improved axis values and placement (working towards non-origin placement)
Absolute screen-space locked axes.

As you pan, the axes stay on the same pixels, the data floats around beneath them.
Zoom bounds aware of legend space.
Save image moved to the menu.  Making way for toggling axes.
Enable/disable legend.
IU for guides
Added filter-iterator glyphset.