Changes:

Moved language from Province into Fief.
Amended Character skills to include level of skill.
Amended calculation of skill effects - now carried out in single method.
Implemented npcHire skill effect.
Introduced informational messages at various points (some feedback, some error).
Ensured validation (and clearing) of goTo queue at various points (e.g. is cleared when adding to entourage).
Started validation of input data (e.g. fief expenditure levels).