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New Features:
* Unit orders during end turn processing will now happen in a deterministic order: ranged orders, local attacks, and then movement. Movement will happen in order of fastest to slowest units, and ships will always move before transports.
Modding Improvements:
* Art and sound file overrides can now be stored in the scenario UI directory. This allows a scenario and its art assets to be completely self contained, instead of having to be being installed to separate locations.
* Modders can now add leader images on the choose country screen for all countries.
* All the Actions whose names begin with "ActDev..." can now be used in scripted events.
