Patch 1.5.13 Prerelease 1

This pre-release includes the new Lua 5.3 architecture, which is also the reason this is a pre-release.

If you've been playing with a 1.5.13 dev-build (i.e. one you got from Jenkins), you'll have to manually set the option enableLua53 to true in your config, because it originally wasn't until I did some stability testing myself. At this point I think it's stable enough for more general testing.

To play with the new Lua 5.3 architecture, take a CPU and sneak-rightclick while holding it in your hand. You'll see a notification in your chat log about what architecture it is now configured for (you can also see that in the extended tooltip of the CPU).

There have also been a good number of other changes, full changelog will be coming with the release proper. For now, I'd appreciate some testing. Let me know if you run into any issues, thanks!