Minor formatting and API expansions for array class.
Minor formatting and API expansions for array class.

keir/libmv,Nazg-Gul/libmv,SoylentGraham/libmv,libmv/libmv,libmv/libmv,petertsoi/libmv,SoylentGraham/libmv,Nazg-Gul/libmv,Nazg-Gul/libmv,petertsoi/libmv,SoylentGraham/libmv,keir/libmv,rgkoo/libmv-blender,Nazg-Gul/libmv,petertsoi/libmv,libmv/libmv,rgkoo/libmv-blender,rgkoo/libmv-blender,keir/libmv,keir/libmv,rgkoo/libmv-blender,Nazg-Gul/libmv,petertsoi/libmv,libmv/libmv,SoylentGraham/libmv,rgkoo/libmv-blender