Merge SBMLInfo and model parser (extend/update the JSON for report)

[matthiaskoenig]

Currently a lot of duplicated code due to parallel developments

1. SBMLReport uses SBML -> JSON
2. SBMLParser & ModelFactory use Model, i.e., SBML -> Model

This should be unified to reduce complexity and long-term maintenance. I.e. the workflows should all be around the internal Model structure. I.e. things should be SBML -> Model -> JSON (SBMLInfo)

This will require major refactoring of information. One additional complexity is that some information is more global in the JSON. I.e. it requires to figure out which Assignments/Events ... manipulate other objects. This should be added in a second global parsing.

• Also Validation information should be added to the report.
• In the long-term models should also be manipulated from the report (e.g. adding annotations)