[ANN] splib 1.4.3 released

[spox]

Splib is a library of helper methods and classes. Nothing fancy or flashy,
just some simple helpers that are tested and known to work on Ruby >= 1.8.6 as
well as JRuby 1.4.0

Quick overview in the README: http://github.com/spox/splib

# Changes in this version:

* Added new Splib.sleep to return actual sleep times that are useful
* Added Monitor#try_lock
* Modify locking behavior on Monitor#signal and Monitor#broadcast
* CodeReloader.reload_code returns new holder instead of gutted holder
* Added some simple checking to remove dead threads that fail to release their
lock

# Fixes:

* Updates to Monitor#wait when used with a timeout