Added p.scatter_matrix tool.
Added p.scatter_matrix tool.

jayhetee/pandashells,codevlabs/pandashells,iiSeymour/pandashells,subodhchhabra/pandashells,micahhausler/pandashells,shaunstanislaus/pandashells,wavelets/pandashells,codevlabs/pandashells,moreati/pandashells,micahhausler/pandashells,shaunstanislaus/pandashells,moreati/pandashells,wavelets/pandashells,jayhetee/pandashells,StevenBlack/pandashells,subodhchhabra/pandashells,iiSeymour/pandashells,StevenBlack/pandashells