clearer func name
replaced old examples with single, complete example
added example usage info
forgot --help
removed old example
use pip to install test deps
coverage/nosexcover not required for tests
support ProxyQueues which return RelayError
Queue-like class which proxies to a Relay
Merge branch 'master' of github.com:icgood/python-slimta
Merge branch 'master' into diskstorage