Rearranged various modifier files
- Also added a few new modifiers
Added new Bardic Performances event chain
- Still missing most localisations
- Also added decisions to hire druids and bards
Modified Druid trait gfx and deleted obsolete gfx
Added basic localisations for druidic caste events
- Still need to write bardic performances
Changed province of Innse Gall to celtic pagans in 867.
Merged on_action files

Just to prevent any problems, since I've been having problems with
on_death in an event.
Added Druidic Training Event chain

Still missing localisations and gfx for the events, but at least it
seems to be working. Still needs testing and balancing.
Changed chance of getting druid trait

To limit the number of rulers with the druid trait
Added stock localisations for training chain
Celtic Spiritual counsellors must now be Druids
Updated to CKII 2.0
Added evil gods

Also added priest titles
Fixed hellenic pagans not having Great Holy Wars
Change to decisions
Druids and Bards now necessary for divinations, aonach tailteanns and bardic performances
Fixed a wrong localisation
Added St-Kilda event chain
Kilda event will only fire for celts
Fixed wrong religion icon
Added province modifiers and localisations
Added base sacred celtic symbols mechanic