Make labRemote pip-installable

This provides the functionality to get labRemote pip-installable. This means one could simply do

pip install git+https://gitlab.cern.ch/berkeleylab/labRemote.git@devel

with a pip > 10.0 (9.0.3 is default on CC7, and current pip is ~v20.0). And this will install it correctly.

The next step after this piece is in, would be to get pre-built wheels on pypi -- which allows this to be installed instantly on a CC7 machine at least, and any other machine one wishes to support (and build pre-built wheels for).