Rebound

* Introducing the Simulationarchive. The Simulationarchive allows for exact (bit-by-bit) reproducibility in N-body simulations and a completely new way of analyzing simulations. See Rein&Tamayo (2017) for details.
* The binary format has changed. Binary files created with an earlier version of REBOUND can not be loaded with this version. However, future binary files will be backwards compatible from this point forward.


Version 2.x

* Minor bug fixes in HERMES integrator and some examples.

* NASA Horizons changed a telnet command. This update implements those changes and restores access to NASA Horizons from within REBOUND.

* Improvements to the Kepler solver. This is typically only relevant for extremly long simulation (1e11 timesteps or more) and extremely accurate simulation with symplectic correctors and a relative energy error of less than 1e-10.

* Small changes to HERMES integrator. It now has a Solar Switch Factor SSF to allow for close encounters with the central object.

* Added adaptive HSF for HERMES integrator. More documentation and paper to follow.