do not align logger names
pull out configuration post_process down same as validation definition
add YARD log support
simplify #configure_children_loggers method
Add logging dependency

Katello now depends on logging rubygem
Fix for Ruby 1.8
Changes of default values

If no logger type specified file is used
Be more tolerant about log path

In case we don't have privileges to create a specified directory we
should not crash. This could lead to problems with early rake tasks.

Also ignore unwriteable log files. Fallback to STDOUT will inform users.
New log files structure
Fix for TaskStatus callback

Logger can now return false so it can rollback saving chain. Also fixed
some old typo in \n