Add function to just use the values from Arepo
Use the hydrogen mass fraction from the code, instead of primordial abundance
Use code HI fraction
Update comments
Allow the gas or HI density to be null, ie, obey skip_grid even when the
grid is generated for the first time
Add class for computing metal densities rather than HI densities
Function for computing absorber fractions
Do not generate a gas grid for the whole box
Implement periodic grids in fieldize, and enable them for BoxHI
Fix typo
Make mean metallicity plots
Python to compute the autocorrelation function
Some fixes
C implementation of the autocorrelation function
Wrap the C function
Make the autocorrelation faster
Correct norm of cddf again
Some changes to the autocorrelation code, before abandoning it
Remove old not-working-any-more scipy.weave SPH interpolation method
Various pylint inspired cleanups