Changes

Fix for client NPE issue - don't missend player spawn packets (#1525)
* Fix #1360 - don't missend player spawn packets
 Player spawn packets were improperly sent by the Minecraft internals in
early NPC spawn sequence, when they are not valid to be sent yet. This
patch blocks their sending until the tracker system is pushed onto the
NPC. Tested and functional.

* improve long name cutting order, fixes #1422
 ensures that root name will always be 16 characters if the given name
was too long - previously, the root name could be as small as a single
character (for input name of 17 characters).
 (commit: 221eb4b)