* Dev 0.89 needs some extra tox dependencies to run
This is based on an issue as seen here https://github.com/home-assistant/home-assistant/issues/22068.
* Update development-environment.md based on C.R.
Included the changes needed to run on Windows and Mac. The extra command for OS X is not tested (I am not able to work with OS X).
* Update development_environment.md
* Config folder location clarification
While this was documented elsewhere in the docs, this is the first thing I was looking for after invoking the dev environment and spent an inordinate amount of time tracking it down.
* link to user docs for clarification
link to user docs to clarify location of config files
When running `tox` on OSX as instructed at https://developers.home-assistant.io/docs/en/development_testing.html an error is received stating `error: [Errno 2] No such file or directory: 'autoconf': 'autoconf'`.
By installing `autoconf` via `homebrew`, this error goes away, and the `tox` tests pass. Telling OSX developers to install `autoconf` at this point in the development environment setup procedure (rather than calling it out on the testing page) seemed to make sense to me.
