Add add_field_env option to the config file to allow fields to be added using values
from the environment.

Strip whitespace from the add_field and add_field_env strings to allow you to put spaces
after the commas (,) for easier readability of the config file.

Release version 32

Revert "Release version 32"

This reverts commit 0fe1015394d09af5e7f62ced16f8a127e22358d5.

Don't force new release... revert __init__.py back to version 30

Remove release number from CHANGES file. Release number will be decided later

Remove info from CHANGES file as requested.

Provide better example in usage docs.
Merge branch 'master' of https://github.com/ronnocol/beaver

Squashed commits