refactor/bugfix bezier ns, add PSample impl & constructors for bezier2/auto-spline2 (removing 3d for now)
add PTransform impl for GMesh
bugfix center fn for rect
change template order
update index.org, add descriptions, examples, update lein alias
0.2.0 release: update common & macromath deps
add type overview table & list of supported operations
bugfix polygon extrude
switch face tessellator in mio/write-stl, remove read-stl-vertices
update readme