update readme
update readme

ActiveState/cloud-foundry-client-js,hpcloud/cloud-foundry-client-js,18F/cloud-foundry-client-js,18F/cloud-foundry-client-js,hpcloud/cloud-foundry-client-js,ActiveState/cloud-foundry-client-js,morikat/cloud-foundry-client-js,morikat/cloud-foundry-client-js