modified build.xml to use system commands - bad practice as this will likely break travis
modified build.xml to use system commands - bad practice as this will likely break travis

edweld/jwt-silex-api,DaGopherboy/Silex-JWT-Rest-Php,jgavinray/Silex-JWT-Rest-Php,DaGopherboy/Silex-JWT-Rest-Php,jgavinray/Silex-JWT-Rest-Php,edweld/jwt-silex-api