base should not take care of checking paths
serve defaults to None, accepts 0 or more arguments
a bunch of tests for the env var support
get env support with a helper function, deferr to it
make the base handle optional config file
serve prepends the BaseCommand arguments
documentation about PECAN_CONFIG added
load_app can now work with no config param passed in
testing will load an app with no config arg passed in
Add change history to the docs.
Slight rearrangement of changelog placement.
Remove pep8 changes from the changelog.
Merge pull request #181 from ryanpetrello/next

Add change history to the docs.
fix some typos on commands docs
fixed pep8 violations
removed all pending pep8 violations
trying to fix RuntimeError tests
only when config is None fallback to conf_from_env
add a teardown to prevent pollution of ENV
fix wording in documentation