Not Conditions

[JasperHorn]

I should support not on Conditions. I want to make:

• Not conversion method which converts the condition into an inverse one
• Not class that wraps a condition
• Not abstract processor implementation that implements the NotCondition class by calling the not conversion method on the wrapped condition

Note: GreaterThan(x)->not() = Or(EqualTo(null), LessOrEqual(x)), while EqualTo(x)->not() = NotEqualTo(x)