Switch euclidean intersection code to use Ceres
Switch euclidean intersection code to use Ceres

Would not expect any significant changes in solver
behavior, but it could be more accurate in some cases.

Switching projective intersection to ceres is marked
as a TODO for now.

petertsoi/libmv,rgkoo/libmv-blender,petertsoi/libmv,petertsoi/libmv,petertsoi/libmv,SoylentGraham/libmv,SoylentGraham/libmv,SoylentGraham/libmv,rgkoo/libmv-blender,rgkoo/libmv-blender,rgkoo/libmv-blender,SoylentGraham/libmv,rgkoo/libmv-blender