Naval Pillage Exploration Bugfix [DEPRECATED]

NOTE: This mod is now deprecated as Firaxis has fixed it themselves. This mod will not be supported, and shouldnt be used. This mod fixes naval pillaging breaking once the player has researched Shipbuilding II. In the Exploration era, naval units can pillage enemy tiles they are on with improvements or buildings, as well as tiles one away with the coastal raid operation. This is lost when the player researches the ShipBuilding Mastery. An investigation showed that the culprit was the modifier that allows all units to embark onto Ocean terrain. As it applies to all units, it was applying to Naval ones as well. My fix was to change this modifier so that it had the requirement on the unit that it was not naval. Note: When the Community Bugfix guy gets back to me, I'll likely fold that into his mod, since this is a small fix, but its so crucial I thought i'd host it as well for now.