Allow ShellBolts to optionally specify the logging level.

[msukmanowsky]

Default logging will still be info to support backwards compatibility.

[nathanmarz]

Can you send me a contributor agreement? Instructions here: https://github.com/nathanmarz/storm/wiki/Contributing-to-Storm

[msukmanowsky]

Sent!

[nathanmarz]

I'm not a fan of this implementation. Can you use numbers instead of strings for specifying the level? 0 = debug, 1 = info, etc. And it seems like it should test against info first because that's the common case.

[msukmanowsky]

Hmm, considering this is implemented in the ShellBolt, having an enum kind of implementation (0 = debug, 1 = info) means that each language would need to maintain the same kind of enum. I thought it'd be an easier interface for the languages to specify the log level using a string no?

[nathanmarz]

Numbers are more performant. This is a protocol, it should be done efficiently.

[msukmanowsky]

Alright, think we're all set here, mind giving it a look @nathanmarz?