start using of aabb2
finish using aabb2
remove unused axis_align_box code
Remove setFromCombination and use hull() instead
remove Aabb2_testOverlap and use Aabb2#intersectsWith instead
remove Aabb2_setFrom and use Aabb2#copyFrom instead
remove unused line
add git path to pub spec as aabb2 is not in the official release of vector_math yet
fix git url