add past and geomUnit property to MFBoundary
add MFLoad and MFBoundary#load
move Edge from RectangleTask to Rectangle2DModel
rename refactoring
split out AnalysisModel and rename package geomodel to model
some rename legacy polygon to facet
extract RectangleGM
change GeomModel to PhysicalModel
rename RectangleGM to RectanglePhM
big refactor, at half way, remove MFBoundary , add MFLoad AnaylysisModel