Update changelog for 5.7.1
[maven-release-plugin] prepare release 5.7.1
[maven-release-plugin] prepare for next development iteration
Fix a few wolf issues
Apply crop trampling setting to all entities.
Apply exp flag and config setting to xp bottles.

"Workaround" for not being able to blacklist exp bottles at the moment.
Although I supposed I could have just fixed that instead, this allows more flexibility.
Added unit test for entry and exit flags to put the matter to rest.
Also cleaned up a few other things regarding tests.