Add some sanity checking when splitting cells.

Stops after 52 splits. This depth is way beyond our precision.


See merge request !250

This depth is way beyond our precision.

Re-factored the whole external potential mechanism to match what is done for cooling

Also, renamed 'disk' to 'disc' and improved the documentation and description of the parameters. 

@pdraper this is just code rearrangement, no changes to the actual physics has been done.

See merge request !249

Re-factored the whole external potential mechanism to match what is done for cooling. Renamed 'disk' to 'disc'.

Give the Gizmo volume the correct dimension in the outputs.

Is this correct ? 

UNIT_CONV_VOLUME is U_L^3
UNIT_CONV_INV_VOLUME is U_L^-3


See merge request !248

Radiated energy



See merge request !247

Align critical structures on 128 bytes and make all their sizes multiples of 32 bytes.

Here is another one for you.

Following the discussion we had earlier about the task structure I have gone through the rest of the code and made sure everything important is aligned on 128 bytes. 

See merge request !240

Collect the radiated energy of all particles when computing statistics and output the result in the log file.