Merge pull request #2226 from gittip/environment.py

Switch to new environment.py library for config
Merge pull request #2227 from gittip/wireup-env

Wireup env
Merge pull request #2228 from gittip/canonical-env

change wireup.canonical to use env
Merge pull request #2229 from gittip/env-configure-aspen

Remove os.environ from configure-aspen.py
Merge pull request #2230 from gittip/env-nanswers

Remove os.environ from wireup.nanswers
Bump version to 12.3.1
Bump version to 12.3.1-dev
Merge pull request #2231 from gittip/env-db

Remove os.environ from wireup.db
Comment out DEBUG in a firefight

https://botbot.me/freenode/gittip/msg/12876804/
Bump version to 12.3.2
Bump version to 12.3.2-dev
Merge pull request #2232 from gittip/un-configure_payments

Take out configure_payments hack
Remove os.environ from wireup.billing
Remove os.environ from error handling test page