remove configurerabbitmq dependence on file config
allow loading settings from environment
move amqp params to environment
remove orchestrator queues/etc from config file
use environment for redis config
remove unused redis config code
move logging config out of yaml file
remove old default logging config
do not load config files at all
remove unused file configuration code
remove load_settings function
connection manager no longer uses settings module
redis config doesn't depend on settings module
remove setting injection code
simplify logging setup
remove unused CONFIG_PATH env variable
downgrade pyyaml to a test dependency
Merge pull request #24 from mark-burnett/environment-config

Use environment for configuration exclusively