Added graceful degredation to uiDateFormat when the values are falsy
Added graceful degredation to uiDateFormat when the values are falsy

marbletravis/ui-mask,gdi2290/ui-utils,bitperbit/ui-map,xuwupeng2000/ui-event,graingert/ui-keypress,sndp-vrma/ui-utils,lith-light-g/ui-scrollpoint,zhaokunfay/ui-mask,HawkHouseIntegration/ui-mask,graingert/ui-jq,Mojility/ui-uploader,mengshadow/angularjs,r0b-/ui-validate,saike/ui-mask,Abbaty/ui-select2,graingert/ui-keypress,angular-ui/ui-event,lukepfeiffer10/ui-mask,stevenkang3/angular-ui-OLDREPO,zhaokunfay/ui-scrollpoint,brettshollenberger/ui-select,kongx73/ui-map,zjplovemm/angular-ui-OLDREPO,behzad88/ui-utils,zhaokunfay/ui-indeterminate,kongx73/ui-map,KingMario/ui-uploader,angular-ui/ui-map,sndp-vrma/ui-utils,lith-light-g/ui-scrollpoint,dhustlerz/angular-ui-OLDREPO,behzad88/ui-map,zjplovemm/angular-ui-OLDREPO,KingMario/ui-uploader,r0b-/ui-validate,NickTomlin/ui-mask,stevenkang3/angular-ui-OLDREPO,NickTomlin/ui-mask,graingert/ui-utils,graingert/ui-jq,angular-ui/ui-indeterminate,angular-ui/ui-validate,lukepfeiffer10/ui-mask,zhaokunfay/ui-scrollpoint,angular-ui/ui-event,Queatz/ui-validate,zhaokunfay/ui-event,angular-ui/ui-scrollpoint,DexStr/ui-uploader,xml/ui-mask,Intilery/ui-select2,Mojility/ui-uploader,zhaokunfay/ui-indeterminate,modulexcite/ui-utils,saike/ui-mask,isaacplmann/ui-mask,bitperbit/ui-map,angular-ui/ui-map,angular-ui/ui-mask,xml/ui-mask,lu4/ui-mask,mufl1h/ui-select2,zhaokunfay/ui-uploader,angular-ui/ui-utils,angular-ui/ui-scrollpoint,xuwupeng2000/ui-event,angular-ui/ui-select2,zhaokunfay/ui-event,aniellepizzo/ui-scrollpoint,isaacplmann/ui-mask,graingert/ui-utils,HawkHouseIntegration/ui-mask,mufl1h/ui-select2,marbletravis/ui-mask,zhaokunfay/ui-validate,angular-ui/angular-ui-OLDREPO,Queatz/ui-validate,pedroso/ui-mask,zhaokunfay/ui-validate,angular-ui/ui-indeterminate,mengshadow/angularjs,angular-ui/ui-uploader,deepuke/ui-select2,dhustlerz/angular-ui-OLDREPO,akhilshastri/ui-utils,RafaelTaranto/ui-mask,zhaokunfay/ui-mask,aniellepizzo/ui-scrollpoint,RafaelTaranto/ui-mask,deepuke/ui-select2,zhaokunfay/ui-uploader,DexStr/ui-uploader,lu4/ui-mask,pedroso/ui-mask