Added build scripts

I'm not even sure if this is a good change, so definitely feel free to close this if you don't like it, pahimar.

**Semi-unrelated:**
Could you please do something about the build number incrementing when building (and not releasing) EE3?  I have to discard the changes each time I build, since it gets incremented in the `build.properties` file.  As a solution, would it be possible to not increment it when building (and/or just put the latest commit SHA there instead of a number)?  Would also make it easier to keep track of what version people are using.

**Totally unrelated:**
I'm going to try to update the outdated localization files so that they can at least be used in-game.