Improved distribution system for conda-forge and pip

[jpn--]

This branch contains work on #424

[coveralls]

Coverage decreased (-0.07%) to 56.275% when pulling 74b1fcc on jpn--:condaforge-dev into a57efa1 on ActivitySim:master.

[bstabler]

includes work on #437 as well

[jpn--]

Any objection to merging this PR into master, and tagging it as v1.0.2? This PR is operationally identical to 1.0.1, just with the dependencies fixed so orca is a dependency and zbox is gone. To make a clean version for conda-forge for #424, conda-forge policy (very reasonably) wants to build code as it appears from the main repo and not a PR.

[bstabler]

As discussed 7/8, we can't publish to conda forge until the code is in master, but having the code in master also means we've released the code according to our Release Process. So, @jpn-- is updating the docs as if these changes are live, and we're working on some additional improvements to make releases more automated - for example, #139.

[jpn--]

I can only work on #139 in a branch of the main repo, not on my fork. So, closing this in favor of the same branch I've pushed now the the main repo.