Fix monolog channels

[iambrosi]

Load Monolog services by default (if logging is enabled), and remove them afterwards in the compiler pass if Monolog is not available. This way, the log adapter will use the guzzle channel properly, assigned by the service definition and not the default channel app, as it does now.

Fixes #35

In my use case, I wanted to exclude all the Guzzle logs from a command output, but I couldn't since those logs were being logged into the app channel.

[iambrosi]

Any news on this?

[evgeny-s]

Any updates on this? Could you please tell the way to put guzzle logs to separate channel and file?