comparator for Ray
Add additional argument to surface of revolution to create toroidal geometry
build/setup: Fix for standalone core builds
Prop: Make make_prop fall back to default in more cases

In particular, [] should turn into an arbitrary Python object prop,
not fail with an exception.
Remove an unnecessary semicolon
made TriMesh::volume work with deleted faces
Merge branch 'master' into windows
renamed shortest_path -> vertex_shortest_path
Makes repos match
Undo changes not requried
add tree functions for trimesh
vector/blas.h: Add comments and reformat
comment mpl assert for buffer
add beziers, svgs, utilities to core
exposed decimater types
Convert polygon code to nested arrays
Rename IdentityMap to arange to match numpy
geometry/traverse: Fix type of thickness for integer case
Rename NestedArray to Nested
geometry/traverse: Disambiguate traverse with single_ and double_ prefixes

Previously only the "tolerance" parameter disambiguated the singly and
doubly recursive overloads, which is dangerously confusing.  Now that
doubly recursive traverse is called double_traverse, the thickness
parameter is optional.