made changes to interpolate3d and tipsy_test.py to fix interpolation as done in snapshot_package
Merge branch 'master' of github.com:pynbody/pynbody
Revert "fooling around with star rendering"

This reverts commit b00672f5e519c987f88c590eaffc1aba5437c0cb.
Revert "made changes to interpolate3d and tipsy_test.py to fix interpolation as done in snapshot_package"

This reverts commit 52c367305bda6efc6a3ae6c07ccce415acace30f.