python setup.py develop triggers installation of pip packages while in conda environment

[pearu]

When in conda environment with all pymapd dependencies installed,

python setup.py develop

unnecessarily triggers installing the dependencies via pip.

As a general but possibly complicated fix is to ensure that the lists in extra_requires do not contain the available packages with proper versions.

A simpler fix for conda environment is as follows: if CONDA_PREFIX is in os.environ then the lists can be empty.