Update sample codes in README and add Travis-CI badge
Update sample codes in README and add Travis-CI badge

Azure/azure-storage-node,yaxia/azure-storage-node,badescuga/azure-storage-node,caleteeter/azure-storage-node,Azure/azure-storage-node,XiaoningLiu/azure-storage-node,aarontract/azure-storage-node,XiaoningLiu/azure-storage-node