Version 0.2
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* Renaming Br to BR and making the latter a monad transformer.

Version 0.1.3
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* Targeting on a new version of aivika-transformers.

Version 0.1.2
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* Fixed a space leak in the Ref module.


Version 0.1.1
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* Updated the random number generator.


Version 0.1
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* Initial version.