C++ solvers display incorrect results when real-valued initial populations are used on the model.

[jtcooper10]

As an example, the LotkaVolterra Oscillator exclusively uses initial values on the range [0, 1), which results in an output of uniform 0s. This can be replicated with the ODECSolver, while the NumPy-based ODESolver displays expected results.

This is likely due to the fact that initial populations are always initialized as unsigned int even for deterministic simulations. We will likely need to provide alternative data structures to support real-valued initial populations.