update gruntfile to display help
update gruntfile to display help

DanielMontesDeOca/angular-swagger-ui,jermspeaks/angular-swagger-ui,DanielMontesDeOca/angular-swagger-ui,kreck/angular-swagger-ui,jermspeaks/angular-swagger-ui,kreck/angular-swagger-ui,btushinde/angular-swagger-ui,btushinde/angular-swagger-ui