work on checker started, minor refactoring

- Checker is a new project, shares some sources with EACirc
- Checker share design with EACirc (same principles)
- logger message type now written automatically (via LOGGER_ constants)
- small refactoring of EACglobals
- global settings now have extra information that need to be updated manually
renaming, phase 1

- folder names made shorter
- old standalone testers deleted
- Checker made compilable