Make NibbleArray data public as Forge does. Fixes #1527
Added check for null configs in Proxy Worlds. Fixes #1516
Added detection for corrupt TileEntities. Fixes #1518

Corrupted TileEntities will now be removed automatically if detected. The
details of the TE will be printed to terminal to help debug the issue.

This was based on my 1.6 commit
MinecraftPortCentral/Cauldron@051136266c53aaadbad96b42fdd94cedc2b16f29
Prevent invalid characters in TileEntity config.

This should prevent YAML startup crashes when a mod uses an odd classname
for their TileEntity.
Update to forge 1194