Create a unit test for the re-engineering of logger
Added the interface
The abstract class for the string format
The concrete class for the file logger
And resharper cleanup

All test passed
Resharper clean code
First attempt to integrate the logger:
Added a factory
Added a fake logger to use when we don't want do log things
removed the \ from the config file

To resolve the dependences beetween configRepository and logger
Updated the tests, all passed.
Clean up code
Merge pull request #5 from Apex-net/Refactor_of_logger

Refactor of logger