add checked/unchecked checkbox and radio button
fix bug with rotation in plane where green line stays displayed
lock point where dragged constraint
expose transformed point stuff in library, and email McNeel
assign default name for import groups based on filename

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rounding, as a special group
associative entities from solid model, as a special group
better level of detail
some kind of import
faster triangulation
loop detection
IGES export
incremental regen of entities