fix(git/packageInfo): ensure that we return consistent paths on all OSes
fix(git/packageInfo): ensure that we return consistent paths on all OSes

Partially solves #123
Closes #124

angular/dgeni-packages,angular/dgeni-packages,petebacondarwin/dgeni-packages,petebacondarwin/dgeni-packages,petebacondarwin/dgeni-packages,angular/dgeni-packages