yeast 8.6.0

• Fixes:
  • Closes #265: Make r_0446 (formate-tetrahydrofolate ligase) irreversible, to prevent non-zero flux through TCA cycle (PR #290).
• Features:
  • Add pathways responsible for the formation of hydrogen sulfide as well as other volatile sulfur compounds during fermentation (PR #300).
  • Closes #302: Simplify model curation with curateRxnsGenesMets function (PR #300).
  • Remove COBRA Toolbox and MATLAB-git dependencies for the MATLAB-based curation pipeline (PR #303).
  • Closes #308: Distribute yeast-GEM.mat in RAVEN's format, to include grRules and metComps fields (PR #301).
• Refactor:
  • Change format of yeast-GEM.txt file to include metabolite names and compartments, instead of metabolite identifiers, to simplify diff-ing (metabolite identifiers are already trackable in the yml-file) (PR #312).