Added cli single pragma query for model-checker. Changed cli avatar-rg layout and flags. Solved a bug in the interpreter. Solved a possible null pointer exp in AvatarExpressionAttribute. Added test for single pragma query. Added rg generation during property study.

Revert "First version model-checker validator which validates internal verification results with UPPAAL"

This reverts commit 9b20334e.

This reverts commit 4edaea66.

This reverts commit 4af9c8c5.

This reverts merge request !325

This reverts commit 2183e1ad.