0.3     (2012-07-24)
   change NonTermination to a custom BlockedIndefinitelyOnIVar exception,
   and require base >= 4. (using NonTermination leads to <<loop>> messages)

0.2     (2012-07-23)
   change BlockedIndefinitely exception (gone since ghc 7.0) to NonTermination

0.1.0.2 (2009-06-03)
   depend on base < 5 instead of base.

0.1.0.1 (2009-01-11)
   make Data.IVar.Simple.tryWrite exception safe (noticed by Chris Kuklewicz)

0.1.0.0 (2009-01-11)
   initial version