Changes in what a 3.3 ruleset can do

[Alien Valkyrie]

Added new requirement type MaxRegionTiles to count tiles that are part of the same region (continent or ocean). RM #629, RM #652

This requirement checks the number of tiles in the given range that are part of the same region as the target tile. This allows detecting smaller islands and lakes (when used at full Continent range) as well as straits/bays/peninsulas (when used at Adjacent or CAdjacent range).

[Alien Valkyrie]

Added new requirement type TileRel to check the relationship between two tiles. RM #614, RM #654, RM #678

This is only available in the same places MaxDistanceSq (see above) is available. Current possible values are primarily about the tiles' continents/oceans.

[Alien Valkyrie]

Moved national border claiming rules to the ruleset. RM #588

New Tile_Claimable effect controls whether a border source can claim a target tile. The Claim_Ocean and Claim_Ocean_Limited tech flags have been removed / turned into user flags (increasing the maximum number of user tech flags by 2).

[cazfi]

New scripting API signal unit_transferred. osdn #44888

[cazfi]

New Veteran_Work effect. Same as Veteran_Combat, but for veterancy from working. osdn #43186

[cazfi]

Lua method edit.change_city_size() added. osdn #44230

[cazfi]

Lua method City:nationality_citizens() to get number of citizens of a given nationality added. RM #844