Add hdf5 subfind script forgotten earlier
Fixed periodic box conditions in halohi

Conflicts:
	halohi.py
Fixed bug in halohi where we crashed if no gas in halo
Move sigma_DLA to the PrettyHalo class
Quick plot to make mean mass-weighted metallicity
Fix bug
Another routine for working with snapshots
Split the halo finding routine into a separate module
Use density threshold in physical density, not comoving
Some comments about comoving vs physical units
Comments again