Major modules rework

- enabled and recode several modules (files, birthdays, disk storage
etc)
- moved all the modules to moduels subdirectories, so they are easyly
trackable
- modules are now configurable (enabled/disabled), under advance account
settings. More to-do would be adding the default enabled modules also to
install-configuration.php
- completed modules translation, now english, estonian translation
should be done for modules
- fixd several found bugs.