added topenv branch to travis file
added topenv branch to travis file

nimble-dev/nimble,nimble-dev/nimble,nimble-dev/nimble,NLMichaud/nimble,NLMichaud/nimble,NLMichaud/nimble,NLMichaud/nimble,nimble-dev/nimble,nxdao2000/nimble,nxdao2000/nimble,nimble-dev/nimble,nxdao2000/nimble,nxdao2000/nimble