Allow multiple loggers per logger module.
Use logger name as {name, Name} disk_log option.
Introduced reload to logs.
Allow usage of different formatters.
separate seconds and microseconds with dot (.), according to RFC 3339
Auto-reload alog_disk_log on file move.
Allow user generated id in alogger.
Merge pull request #33 from f355/master

Several improvements

- Multiple loggers per one logging module
- Log reloading support (after rotation)
- Custom formatters support
- Some cosmetic changes