Corrected when fallback commands are registered.
Added generateExtBlockSections support and handled generator errors better.
Revamped bulk sending to split chunks by how big they are.
Fixed InteractEntityMessage decoding (fixes #163).
Fixed decoding of client brand, some PluginMessage tidying (fixes #161).
Fixed sneaking and sprinting handling in PlayerActionHandler (fixes #165).
Tidied error messages on unclean disconnects (fixed #110).