Druidic: Added the Druidic Religion

Updated the religion file, added a druidic religion and a reformed
druidic religion.
Druidic: Added Holy sites and Head of Religion
Druidic: Updated Localisations

Almost all localisations are inside, a few are missing.
Merge branch 'vanilla-druidism' into druidism
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 religion
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
Reloaded the druidism branch

Some weird detached head problem happened and I lost the whole branch
Updated Readme

Turns out there are no scottish, welsh and breton pagans
Added GFX

Wolf trait, Gwydion coa, religious icon
Nicknames

The Wolf and The Boar
Added Holy Order

The Sons of Gwydion
Updated various files
Finalised the Holy Order