Skip rendering block particles with a null location.
Move where the Eclipse launcher file generates to and properly Git-ignore it
Merge pull request #786 from mkienenb/skip-rendering-block-particle-with-null-location

Skip rendering block particles with a null location.
Fixed EntityRef.NULL to not expose the NullEntityRef implementation.
Fixed a direct use of the EntityInfoComponent in the core module.
Merge from upstream
Tiny bit of cleanup