Revision history for Hash-MD5

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# Version 0.01  Date: 2015/01/13 (Mario Zieschang)
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* First version, released on an unsuspecting world.

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# Version 0.02  Date: 2015/01/16 (Mario Zieschang)
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* Bugfix got always the same checksum
 
* Add sub for arrayref

* Refractoring

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# Version 0.03  Date: 2015/01/17 (Mario Zieschang)
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* Bugfix tests failed