added align option for log format

[Kikobeats]

because read this:

debug:  » isCached? true
info:   » stream:end
info:
info:   » total users proccesed: 5
info:   » total invalid users: 2
info:   » total new report generated for valid users: 0

is more fancy than read this:

debug: » isCached? true
info: » stream:end
info:
info: » total users proccesed: 5
info: » total invalid users: 2
info: » total new report generated for valid users: 0

Because the length of the log level is different. Basically adding a align:true flag and add a \t between log label and message content align all the logs.

what do you think?

[Kikobeats]

PR in #623

[indexzero]

Going to close this so we can discuss on the PR.