Addition of a new IMEX RK scheme, thanks to brownbaerchen (9)
0.1.9
- definitive structure and test for the node-to-node (N2N) formulation - N2N form can be used for $Q$ and $Q_\Delta$ coefficients similarly - started tutorials
0.1.8
- finalized a proper design for $Q_\Delta$ generators, with some additional safety checks - minor improvement on docs