This makes it easier for downstream projects (forks) to replace the
version fetching system with their own. It is as simple as implementing
an interface and overriding the default implementation of
org.bukkit.UnsafeValues#getVersionFetcher()
It also makes it easier for us to organize things like the version
history feature.
Lastly I have updated the paper implementation to check against the site
API rather than against jenkins.
There is an artificial delay added to chest close sounds (of 10 ticks)
to make them "feel" more true to vanilla. The problem is that because of
this delay it is possible for the block to be removed by the time the
sound plays.
With 1.14 in the state it is the timing necessary to encounter this
issue has increased.
The correct fix is to just return early if the property checked for in
the TileEntityChest sound method does not exist for the block at the
current location.
Fixes GH-2074
