* Entity (mostly rotation) fixes
This PR adds:
- Pig health displaying. Doesn't fix pigs being able to be controlled
- Entity rotation is *mostly* correct. Villagers and sitting cats still seem to be odd but the ender dragon works great.
* Remove debug line
* Abstract rotation updating to functions per-entity
* Don't include changes from other projects
* Minor improvements
* Make updateRotation and updatePositionAndRotation cleaner
* Javadoc
* Implement helper methods for sending packets, fixes an NPE when chatting before connecting to the remote server
* Change method names
* Add a space between doc comment lines
* Add debug messages
