Logger flushing

[botanicus]

Otherwise users will have empty logs. Also go through all the logging stuff and use bang methods when necessary, like for an exceptions and. Standard logger doesn't support these methods, but I would say it's up to user to take care about it, if he really needs standard logger. The only reason why someone might need it is when he use it with Rails or something similar old shitty framework (yep, I'll have to solve it for my rails-template-inheritance plugin).