[Diff since v0.5.6](https://github.com/LCSB-BioCore/SBML.jl/compare/v0.5.6...v0.6.0)

**Closed issues:**
- `parseSBML` function to directly pass in an XML string  (#111)
- piecewise handling fails (#112)
- Rename helper functions like `getS` to nicer names (#121)
- Extracting math with <geq/> returns a zero character (#124)
- expandInitialAssignments converter fails on case 01234 (#125)

**Merged pull requests:**
- Use `Unitful` for units, instead of a custom struct (#109) (@giordano)
- Rename `SBMLVersion` -> `Version` and unexport it (#120) (@giordano)
- Rename some functions to something easier understand (#122) (@giordano)
- Add function to read SBML model from a string (#123) (@giordano)
- Fix checking of errors in `libsbml_convert` (#126) (@giordano)
- Always pass `report_severities` argument to `check_errors` (#127) (@giordano)
- fix parsing of relational operators (#128) (@exaexa)
- version bump to 0.6.0 (#129) (@exaexa)
This tag has no release notes.