testing 0.5.0 (#105)

0.3.1 (#84)

* adjust nbook

* s to t

* Initial work for symplectic integrators

* odeint_symplectic added to API

* hypersolver base

* tutorial hypersolvers

* new tutorial, better readme

* better readme

[org] update publish

[tests] adjust tolerance of adjoint tests

Update change_log.rst