Review of Jose Armando Garcia Sancio's std.log

[mist]

> log!(knownCause|unknownEffect|breaksFlow)("This is a severe 
> message.");

Simply defining log level enum in terms of this bit field would 
help a lot.
Like, what is the first thing I do when getting a new log lib? 
Checking all
pre-defined log levels and deciding when to use them. And, woah, 
here it is, subtle but formal guide for use cases!