Lager Logging integration (first step)

Hi Evan,

In a effort to control my logs (and that they do not control me), I integrate lager in core, this wil satisfy almost all logging needs (no lager:x calls changes, for now is using the error_log integration).

Now you can easily parse your logs with well known tools, etc. or use the multiple backends (syslog, loggly, ...).

The default config is similar to the default actual behaviour log/console|error, some output must be adapted (mainly not necessary final ~n).

I have also a modified version of boss_db (adding the parse_transform) <- you think is a good idea?