SBML Simulation Feature Improvements

Now that the SBML Simulation branch is live on our development server, I would like to summarize what needs to be added / improved.

1. Support for SBML Parameters and SBML Local Parameters (both in the UI and import / export). This is especially important from a testing perspective, since it is extremely rare to find an SBML model on the internet with no parameters.
2. There is a known bug where after importing an SBML file with kinetic data, we can't see the kinetic data in the UI. However, simulation still works.
3. The simulation feature should work out of the box without setting any kinetic data for reactions. For that reason, the kinetic data should default to 0.
4. The simulation backend allows us to generate data (over time) for the amount of a species, the concentration of a species, the speed of change of a species. Currently, we only show the user the concentration over time. We can give them the choice.
5. In the simulation literature, there are various terms like Metabolic Control Analysis, Stochastic Simulation, Steady State Analysis... I don't know exactly what these are, or for what purpose these are useful, or if we are interested in implementing these.
6. SBML has a number of other features that we can look to implement. They are listed in the SBML Specs under section 4. We currently implement Compartments, Species and Reactions.
7. There is a known bug concerning the parameters, they are not properly discarded when we load another file on top of an existing one.
8. Prepare a testing environment to check against the SBML Test Suite, for the implemented features.

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