[Diff since v0.9.2](https://github.com/LCSB-BioCore/SBML.jl/compare/v0.9.2...v0.10.0) **Merged pull requests:** - Clean up the parameter handling (#182) (@exaexa) - separate substance units from initial amounts and concentrations (#183) (@exaexa) - extract reaction names (#184) (@exaexa) - species constantness (#185) (@exaexa) - bump version 0.10 (#186) (@exaexa)