Merge pull request #76 from crazy2be/dev

Dev
Add README.
Fix #71, make controls a bit easier to read.
Probably fix #77, but difficult to test.
Potential fix for #43, also gets rid of machine-gun blaster.
Fix #66, at least partially. We'll probably need a better fix in the future, but this *should* work for now.
t and t2 are not global anymore.
Merge pull request #78 from crazy2be/squash

Squash
Implement Send() and SendLossy() on Clients (and similar Broadcast() and BroadcastLossy() on World). Cleans up the code a bit, and fixes #79.
Reduce contention over World.chunkLock, fix #64.
Merge pull request #81 from crazy2be/server-cleanup-attempt-2

Server cleanup attempt 2
Merge pull request #82 from crazy2be/master

Merge from main