Add new Statistics to fix initial pop bug#5

pbronka merged 3 commits intopbronka:bug-fix-update-initial-populationpbronka/SimPaths:bug-fix-update-initial-populationfrom

MRC-CSO-SPHSU:bug-fix-update-initial-populationMRC-CSO-SPHSU/SimPaths:bug-fix-update-initial-populationCopy head branch name to clipboard