Vampire society rework

[newtociv6]

Rework of overpowered vampire units and remove vampire castle. SQL only, need to be integrated into a mod or Expansion2.modinfo.

The basic idea is to remove overpowering and allow vampires to be repurposed for various roles.

• Vampires have base move 3, sight 3, can defend itself at sea, cannot enforce ZOC.
• Vampires' strength is always max melee unit's strength +10.
• No combat strength increase from killings, instead vampires can earn experiences and promotions: there are 12 promotions in total.
• The max level vampire can hide, jump across mountains, move fast like cavalry, attack multiple times a turn and restore HP by killing. No promotion increases its strength further.
• No vampire castles; instead vampires can teleport between cities like great people.

This is finished and played myself, but I can't publish mods from Mac.
To use it yourself, edit DLC\Expansion2\Expansion2.modinfo:

    <UpdateDatabase id="Expansion2NerfedVampires" criteria="Ethiopia_Mode">
        <Properties>
            <LoadOrder>999991</LoadOrder>
        </Properties>
        <File>NerfedVampires.sql</File>
    </UpdateDatabase>
    <!-- INSERT ABOVE BLOCK BEFORE THIS LINE -->
    <UpdateText id="Expansion2_CoreText" criteria="Expansion2">
        ...