Cosmetic changes and new version number

Updated author list, configure script to display whether libNUMA was found and install instructions. 

Also moved to version 0.2.0 since we have multi-timestep.

See merge request !99

Updated author list, configure script to display whether libNUMA was found and install instructions. Also moved to version 0.2.0 since we have multi-timestep.

Remove a reference to the hydro tasks in the scheduler.

This is a quick one-line change but just wanted to check with you that this is OK.

The goal is to remove all explicit reference to (hydro) task names in the scheduler to keep it generic and re-usable as-is for the gizmo scheme. 
Will do a similar clean-up for the gravity bit later on.

Re-assign to me if you are happy with the change.

See merge request !95

Removed undefined behaviour.

Solves issue #49 which. That was indeed an undefined behaviour although it was probably fine.



See merge request !92

New script for very large ICs

This just adds a new script to generate a very large uniform box ICs. 

I wanted to test the code with a very large number of particles on cosma-5 so needed a script robust enough and that did not need to keep all the data in memory before writing to a file.  

See merge request !97

Integer timeline

This modified the way we do multiple time-steps. The time-steps are now placed on an integer timeline and can take values from 0 to 2^29 where 0 corresponds to the starting point of the simulation and 2^29 is the end point of the simulation. This effectively limits the number of time-steps that can be performed and sets an absolute minimal time-step size. If need be we can later on extend the number of time-steps allowed by switching to a long long but I have not seen this being necessary in any EAGLE or other simulations we ran.
However, it prevents the assignment of 0-sized time-steps that occur in the current version of the code when using a final time which is not of the form 2^n (n positive or negative integer). This hence fixes issue #87.
Quite a lot of changes scattered across the code but the only non-trivial ones are in runner_dokick() and engine_init().


While working on it I have corrected the count of number of particles updated in a given time-step. This is now correct. Fixes issue #89.

Finally, I have also added a message at start-up displaying which version of SPH we run.



See merge request !94

Missing files and other small bugs

A bit of a mix:

- Added files to the Makefile.am such that 'make dist' works (issue #100)
- Unit tests now compile (issue #99)
- Fixed XMF i/o crash (issue #101)



See merge request !93