Cannot install on pip 10.

[piraz]

Error on the setup.py execution, no module named pip.req:

python setup.py install
.
.
.
Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-y4mf_vgf/firenado/setup.py", line 18, in <module>
        from pip.req import parse_requirements
    ModuleNotFoundError: No module named 'pip.req'

See: https://stackoverflow.com/questions/25192794/no-module-named-pip-req

[piraz]

This is the change on pip that caused the issue: pypa/pip#4700