Fix food-tracker project data model
Fix food-tracker project data model

So three separate entries actually show up, even though the GitHub repo
are actually blog drafts :|

ibm-watson-data-lab/ibm-watson-data-lab.github.io,ibm-watson-data-lab/ibm-watson-data-lab.github.io,ibm-watson-data-lab/ibm-watson-data-lab.github.io,ibm-watson-data-lab/ibm-watson-data-lab.github.io