Give Nemo it's own personal show-desktop-setting, instead of using
Nautilus'.  Add an autostart condition to watch this setting.

Add autostart condition
Pathbar:  Altered shape to wedge, improve styling
Tweak spacing between breadcrumbs
pathbar: Make DnD highlighting a bit more consistent with the standard
GTK highlight.  Calculate button X position better so spacing is better
across themes.
pathbar: Improve directory name spacing in the breadcrumbs chain,
reshape arrow a bit.
Make pathbar a bit narrower, pointier.  Play with style a little bit.
Remove selected folder boldface, and remove child displacement for
selected crumb (it's much too pronounced for the narrower path bar.
Fix pathbar width calculation a bit.
Pathbar - a little more tweakage of the layout
Pathbar - still more tweaking layout
More pathbar fixes
Increased breadcrumb height by 2 px, some more calculation tweaks
Make breadcrumb buttons look a bit more "buttony"
Reverse gradient direction on selected and hovered buttons -
this maintains the illusion of the same light source casting a shadow
on a convex button (un-selected) and a concave button (hovered or
selected).

Really, I've been messing with this far too much.
Keep hovered gradient direction the same with respect to what we're
hovering over.
Breadcrumbs: Lighten up selected item slightly.
Breadcrumbs: More. Tweaking.  Also, fixed drag'n'drop highlight profile
to better conform to the new, pointier shape.
Liked the shading better previously
Less pointy, remove unnecessary shadows, border
Merge pull request #157 from mtwebster/breadcrumbs

Altering shape of pathbar/breadcrumbs 'buttons'