Updates for v0.7.0

[MasonProtter]

GraphDynamics v0.7.0

New features

• A PolyesterScheduler() scheduling object has been added which allows for parallelizing solves using Polyester.jl. This option helps performance during ODE solves where GC time dominates if multithreaded.
• If any subsystem in a problem has a parameter named dtmax, then the smallest dtmax parameter in the system is forwarded as a keyword argument to ODEProblem and SDEProblems to limit the maximum stepsizes allowed by the solver.
• If a connection type overrides GraphDynamics.connection_needs_ctx to give true, then connections of that type will be given a fourth ctx argument which gives it access to the full list of states_partitioned, params_partitioned, and connection_matrices when accumulating inputs.
• GraphDynamics integrates with Latexify.jl to latexify the equations of a GraphSystem.

Breaking changes

• PartitionedGraphSystem has been removed; GraphSystems holds a field g.flat_graph field with a PartitioningGraphSystem object which actively flattens and partitions the graph during solving
• apply_discrete_event!, apply_continuous_event!, and ForeachConnectedSubsystem have had their vstates and vparams arguments combined into a sys_view argument, which gives a view into the affected system for (and the connection form gets a sys_view_src and sys_view_dst). This sys_view can have it's fields be updated in place like so:

function GraphDynamics.apply_discrete_event!(integrator, sys_view, sys::Subsystem{MyType}, _)
    sys_view.x[] = sys.y
end

This will modify the x state or parameter of the system when the event triggers.

• apply_subsystem_noise!'s first argument is now modified in the same way as the view arguments of apply_discrete_event!. One would now write e.g.

function GraphDynamics.apply_subsystem_noise!(vstate, sys::Subsystem{BrownianParticle}, t)
    # No noise in position, so we don't modify vstate[:x]
    vstate.v[] = sys.σ    # White noise in velocity with amplitude σ
end

rather than vstate[:v] = sys.σ