Core log methods

[andrew-chang-dewitt]

The main methods to be called by a user of this library. Their purpose is largely the same as their counterparts in the logging standard library. The key difference is that each method is asynchronous and sends the LogRecord to two destinations by default: stdout and a user configured AMPQ queue.

Each of these methods shares the following behaviors:

• Log given data to stdout (can probably defer to standard library logging for this).
• Publish message on user configured root routing key over AMQ with direct exchange.
• The second level of the routing key is configured by the method called and matches the method name (e.g. calling warn with a root of ‘logging’ publishes with the routing key ‘logging.warn’).

The core methods are:

• debug
• info
• warn
• warning
• error
• exception
• critical