Basic report of processing MegaL input

[rlaemmel]

• List resolved entities with some information about the resource resolved to.
• List unresolved entities with some classifier describing the reason for failed resolution.
• List relationships that were satisfied.
• List relationships that were unsatisfied.
• List relationships that had no associated concrete relationship type.
• List relationships that could not be checked because resources needed by concrete relationship type plugin were missing.
• List relationships that could not be checked because entities were unresolved.

There are associated warning/error levels:

• The best case: All entities were resolved and all relationships were checked and satisfied.
• The worst case: Some relationships were not satisfied when checked.
• Warnings perhaps only for all other cases.