* Refactored - moved fields to own file
* Refactored date part fields to extend field class
* Added proper field prefixing for join names

* Added convert to models option
* Added tests for reverse joins
* Fixed bug not returning any rows when not selecting models
* Added query logger and manager with tests
* Removed hardcoded value
* Added default logger name

* Refactored logger length tests
* Refactored DatePart to DatePartField
* Added count field to replace django count