accept logging level

[jfelectron]

This allows a logging level to be passed to the log handler on init.

This is useful for the Loggly handler because the plans are tiered and you may not want to send all your logs to Loggly.

[coveralls]

Coverage remained the same at 100.0% when pulling 5f55741 on jfelectron:accept-log-level into c8729e1 on psquickitjayant:master.