Add findAll method
Add test
Add const modificator to some parameters
Add remove() method
Add test
Add removeBy method
Add test
Add removeAll() method
Add test
Separate update() method from save() method
Update test
Add listSize() method
Add test for him
Update existing tests
Add exists() method
Add test
Add exists(id) method
Add test
Add exists(ORMWhere) method
Add test
Add count() method
Add test
Add count(fieldName) method
Add test
Add count(ORMWhere) method
Add test
Add average() method
Add test
Add maximum() method
Add test
Add minimum() method
Add test
Add sum() method
Add test
Add average(ORMWhere) method
Add test
Add maximum(ORMWhere) method
Add test
Add minimum(ORMWhere) method
Add test