ModelNotFoundException to include setter and getter for model name.

This would allow identifying the model name much easier without having to have additional string parser, and at the same time preserve the current message.

Signed-off-by: crynobone <crynobone@gmail.com>
tweak exception message

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch 'feature/not-found-exception' of https://github.com/crynobone/framework into crynobone-feature/not-found-exception
Work on message, etc.