Add pyyaml as first class dependency
Add pyyaml as first class dependency

mpurzynski/MozDef,jeffbryner/MozDef,mozilla/MozDef,mozilla/MozDef,mpurzynski/MozDef,mpurzynski/MozDef,jeffbryner/MozDef,mozilla/MozDef,jeffbryner/MozDef,mpurzynski/MozDef,jeffbryner/MozDef,mozilla/MozDef