Various tweaks and new skill synergies for the Empire, Dwarfs and Nurgle

Update for game version 5.0:
- added AI skill utilization hints to new characters where they were missing
- added AI skill utilization hints to existing characters that got new skills or skill changes
- added several skill synergies for new and modified skills
- adjustments to army skills to account for the new units and skill and skill changes

- Lore of Hags casters will avoid Earthing because their upgraded spells don't miscast
- Added a couple more skill synergies to Cathay LL to help them pick skills in their unique lines

Update for game version 4.2:
- added AI skill selection hints for the new characters
- added AI skill selection hints for the Lore of Hags
- small tweaks to the red skill lines for Tzeentch and Grand Cathay to account for the new units
- other small improvements

Hotfix for a key that was removed in 4.2

Fixed a mistake where Orgres would prioritize instead of avoid the Lovely Jubbly skill

Lore of Tzeentch caster heroes will no longer pick Glean Magic because the AI can't use it properly
(caster lords were already avoiding it)

Mother Ostankya should get through her magic line slightly quicker now

Daemon Princess should progress through their magic line and get Arcane Conduit faster now

Update for Patch 4.1