Applicabilities and Exceptions should be in singular

[VladimirAlexiev]

All class names are in singular, so these two should also be in singular. https://github.com/Accord-Project/aec3po/blob/5fb6f7e2b8b9f0f208caeeab68461aa8b3c0dfcd/src/aec3po.ttl#L182

[VladimirAlexiev]

• @EdliraK "Has been fixed in the ontology. The documentation (pylode) doesn't reflect it yet due to glitch with the update."
• I just pulled, and it's still not fixed:
  • aec3po:Applications vs aec3po:Applicabilities -> aec3po:Applicability
  • aec3po:Requirements vs aec3po:Requirement -> only aec3po:Requirement
  • aec3po:Exceptions, aec3po:Selections -> only aec3po:Exception, aec3po:Selection
  • in the comments "Represents the Exceptions tag..." -> "Represents the Exception tag..."

[beachtom]

This is sorted now.