[Logger] Define output

[marceloboeira]

Currently the logger is hardcode to the STDOUT, which may be not a very good option for every user, what about defining this in the CLI?

e.g.: bojack server --log ./shared/logs/bojack.log

BoJack would have to create a new file, with the given prefix and add a timestamp:

e.g.: ./shared/logs/bojack_201609201010.log

[hugoabonizio]

@marceloboeira what 201609201010 is suposed to be? 2016-09-20 10:10?

[marceloboeira]

@hugoabonizio ahaha something like it, doesn't have to be a different file for each, but I would recommend that instead of opening old files and writing over it...

[hugoabonizio]

@marceloboeira OK! I add seconds to the timestamp too. Check #35 if it is the expected behavior.

[marceloboeira]

@hugoabonizio seems OK, we just have to create at somepoint an abstraction to logger so we can implement and test this kind of stuff, otherwise cli.cr is going to be huge and buggy.

[hugoabonizio]

@marceloboeira you're right!