Mailer project continued:

Mailer project continued:
- Most data of advert network 'superomo24.de' added to ext-network
- Some templates for ext-network renamed (networks->network_data) to fix
  inconsistence with database table
- Templates for extension management (admin_extensions/~_delete/~_edit) renamed
  to follow naming convention
- Sub-Id tracking: Admin area almost finished (edit/delete of sub ids
  unfinished)
- Added space between `foo`,`bar` database query to make it better readable
- Other minor improvements
- TODOs.txt updated