REL: 6.0.0 (#104)

- Configuring precision causes breaking API changes
- The threading layer optimisation radically improves throughput

REL: 5.0.0 (#94)

Bump version (#81)

REL: 3.0.0 (#72)

REL: 2.0.0 (#61)

* Bump version

* Fix rel version

Fix Bug in P2M method (#24)

* Fix bug in p2m method

* Fix mispelled var name in m2l operator

* Fix nodes examined in downward pass

* Fix failure to add multipole expansions for all neighbors in downward pass