loggers

Move from register_* to add_* & remove_

I found add_timer() cleaner than register_timer, cleary ..
so decided to fix this long naming issue.


git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/fork@1499 b32b6428-25c9-4566-ad07-03861ab6144f