When creating the ghost tasks as well as the hydro-related subgrid tasks, only do so if the cell actually has any gas particle.

When interpolating the 1D tables in the EAGLE cooling model, use a small epsilon for the table edges to avoid out-of-table access.

Improve the check for cooling tables in the EAGLE model to prevent the constant re-loading of tables every step at z=0.

When interpolating the 1D tables in the EAGLE cooling model, use a small epsilon for the table edges to avoid out-of-table access.

Improve the check for cooling tables in the EAGLE model to prevent the constant re-loading of tables every step at z=0.

Updated the isolated galaxy example with the new names of the parameters for EAGLE cooling and chemistry.

Correct additional eagle cooling abundances

Closes #509

See merge request !708

Get the constants Msun/pc^2 and Msun/kpc^2/yr from the constants instead of making a constant for them