Merge branch 'ci/pyarrow' of github.com:minggli/pandas into ci/pyarrow

* 'ci/pyarrow' of github.com:minggli/pandas:
  update requirement-dev from conda env
  add arrow-cpp
  revert to original env file
  Revert "mock envionment.yaml"
  temporarily modify travis.yaml
  remove first change
  mock envionment.yaml
  exploratory push

Author: minggli