Added minor titles to druidism

Vates, Druids, Bards, Champions and Uchelwrs.
Added the headhunter events
Changed the battle events to allow for headhunter events
Added temporary flags for the heads of the new reformed religions
Added images for traits, ambitions and events
Added druidic traits
Added conversion modifiers for rebirth of druidism event
Added the conversion to druidism ambition
Updated Localisations