Allow architectures to be created from expressions.
First version with addition of Or, And, Not,  IsMapped, HaveCorrespondingUnit, IsA, Allow to build rules excluding by expression, Allow architectures to be created from expressions.
Add DependsOnlyOnTheseExpressions, NotDependsOnTheseExpressions and MustNotDependOnComponents, allowing for much more complex constructions.
It also adds several small fixes or improvements.