ScalaSTM release 0.2

I'm happy to announce that ScalaSTM version 0.2 is now available. This
release includes the API that the Scala STM Expert Group is developing
for the Scala standard library, and a reference implementation.

Site: http://nbronson.github.com/scala-stm
Source: http://github.com/nbronson/scala-stm

Changes between 0.1 and 0.2:

* Substantial performance improvements, especially for nested atomic
blocks.

* TSet.View and TMap.View are integrated into the Scala collection
class hierarchy, with factory companion objects and Builder and
CanBuildFrom instances.

* A fix for whileCommitting handlers (issue #3).

* TxnLocal can now be read and written from while-preparing and while-
committing handlers. Combining TxnLocal and life-cycle handlers is
now more concise.

* Transaction statistics can be enabled for the default algorithm
with the VM argument -Dccstm.stats=1 (details in the ScalaDoc for
scala.concurrent.stm.ccstm.CCSTM).

Thanks,
Nathan