Fix Java bindings using short instead of boolean for some methods

[HalfVoxel]

Now things like this work

if (gc.queueResearch(UnitType.Knight)) {
    System.out.println("Bools work!");
}

instead of having to do

if (gc.queueResearch(UnitType.Knight) == 1) {
    System.out.println("Bools work!");
}

[kazimuth]

Oh, dang, hm.

Unfortunately this is a breaking-change to the API, and given our update system I don't want to break people's code underneath them. Maybe it would be best to define some new methods called e.g. queueResearchBool? That will require some plumbing though.

[HalfVoxel]

Well... Considering how much people are complaining about it being that way in Discord. I don't think people will complain much when it is fixed.

[Daspy11]

please just fix it. tag everyone in the discord. it's awful.