13.0.0.4 (2015-05-30):
2    - Moved VERSION to CHANGELOG
33.0.0.3 (2015-03-29):
4    - Cleaning up headers to compile cleanly with GHC 7.10
53.0.0 (2013-05-29):
6    - Removed the deprecated compatibility modules.
7
82.1.0 (2013-05-29):
9    - Added UNPACK pragmas everywhere to reduce indirections.
10    - Added versions of newBroadcastT*Chan for TMChan
11    - Deprecated all the compatibility stuff, since newBroadcastTChan requires stm >= 2.4 anyways.
122.0.0 (2013-05-12):
13    - Add TQueue support
14
151.3.1 (2012-02-29):
16    - Corrected the CPP macros now that stm-2.3 is released.
171.3.0 (2012-02-25):
18    - Added Control.Concurrent.STM.TMVar.Compat
191.2.0.3 (2012-02-12):
20    - Change stability from experimental to provisional.
211.2.0.2 (2012-02-12):
22    - Documentation fix for Control.Concurrent.STM.TMChan.writeTMChan
231.2.0.1 (2011-05-07):
24    - Moved old TBChan,TBMChan implementations to ./test/bench/
251.2.0 (2011-05-07):
26    - Various optimizations.
27    - Switched to using 2 TVars in TBChan and TBMChan, reducing
28      contention between readers and writers and improving throughput
29      considerably (when multiple OS threads are used).
30    - Control.Concurrent.STM.TBChan: added estimateFreeSlotsTBChan,
31      freeSlotsTBChan
32    - Control.Concurrent.STM.TBMChan: added estimateFreeSlotsTBMChan,
33      freeSlotsTBMChan
341.1.0 (2011-04-05):
35    - Control.Concurrent.STM.TBChan: added tryWriteTBChan
36    - Control.Concurrent.STM.TBMChan: added tryWriteTBMChan
371.0.0 (2011-04-03):
38    - Initial version forked from Posta-IPC.
39    - Added tryRead* and tryPeek* functions for the various channels.
40