v0.5.0

Added

• Neighbour finding via kd-tree.
• Compute SPH derivatives using kd-tree.
• IPython tab completion for Snap arrays and Profile profiles.
• Profile can have ndim==1 which gives a linear profile, useful for box calculations.
• Option to turn off caching of particle arrays, so that they are always read from file.
• Write derived arrays to HDF5 file, and read arrays from that file onto a Snap.
• Added logging of warning and other information messages.

Changed

• Generalize sub-types: dust_type → sub_type: this allows for Phantom boundary particle sub-types.

Removed

• Remove Visualization class in favour of just returning matplotlib's Axes and Figure objects.