Point locator: reject foreign points cheaply, locate once, and containment-check the cell hint (items 1-3 of #551, fixes the #432 class) - #556

Point locator: reject foreign points cheaply, locate once, and containment-check the cell hint (items 1-3 of #551, fixes the #432 class)#556

lmoresi merged 9 commits into

developmentunderworldcode/underworld3:developmentfrom

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