Bypass Adjustments

This mod makes several adjustments to bypasses: 1) Wormholes no longer generate within Fallen Empire territory. No more worries about the xenophobes on the other side. This is incorporated into my Unofficial Patch. 2) Gateways can only spawn in, and can only be built in, black hole systems. This results in a much more strategic late game in my opinion. Wormholes are also blocked from generating in black hole systems, so they can't share a system with a gateway. For Federations I have adjusted Black Hole spawns so they will be more spread out, and (slightly) more common. They generally won't spawn next to each other. I made a More Black Holes mod for people who still feel there aren't enough valid gateway spaces. For 2. 7, this now checks for a black hole 'star' per @Aldoro's suggestion. So you can get around the black hole restriction with appropriate gigastructures. Or the Worm. 3) No more fallen empires or worse using your (normal) gateways. They can only be used by you, your subject/overlord, or other members of your federation. Anyone can use gateways in unowned systems. L-Gates are largely as usual, except Amoebae and Tiyanki can't use them. Unfortunately there is no easy check for people you are allied with in a war, so non-federation allies will be unable to use your gateways. This also is incorporated into my Unofficial Patch. 4) Adds a cooldown for using gateways by event. There is a tech to overcome this. I had wanted to make use of the windup and cooldown times for gateways, but that and the ftl_multiplier isn't actually functioning currently for bypasses. I've made a bug report about it. 5) As gateways can no longer be used in controlled-but-not owned systems, I have disabled the tech for the time being. My solution was pretty hacky so I don't much care for it. There is a nasty bug that crashes the game hard because of my original trick for this. In theory you can have multiple types of megastructures upgrade to the same type, but the game will crash hard