Update lib Base_library with methods config, and __get
Merge branch 'develop' into feature/mailer
Update lib mailer/Mailer

* Nicer Mailer::_log_mail
* Now sending mails logs them on development and sends then on any other environment
Add admin/mailer and admin/mailer/compose
Update lang eng/icf_button

* Add line 'icf.button.send'