Document almost all the things

Still missing:
Quaternions
Holograms

See #84
Merge pull request #99 from Xandaros/iss84

Document almost all the things
Fix tools trying to spawn the wrong entities
Merge pull request #100 from Xandaros/toolfix

Fix tools trying to spawn the wrong entities
Restrict net messages to instances of same screen

Other communication will be handled by remote hooks
Merge pull request #101 from Xandaros/netfix

Restrict net messages to instances of same screen