Conda package support

[m-jamieson]

Create conda build recipe so that eLCI can be installed using conda in addition to pip.

[m-jamieson]

After looking into this a bit for our own modules, to work as intended, all of the dependencies will need the ability to be installed by conda as well, so olca-ipc along with the other EPA packages.

[WesIngwersen]

Is it possible to do a conda install from github, like you can with pip?

[m-jamieson]

I would say not really: https://stackoverflow.com/questions/19042389/conda-installing-upgrading-directly-from-github

But there's no reason why the binaries required to install from conda couldn't be stored in Anaconda Repository.

[m-jamieson]

As an interim solution, branch issues/65 has an environment.yml file to allow a conda user to create an environment with major dependencies installed via conda rather than pip.