Updated for Forge 1.12#13

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Commits on Jun 15, 2017

Commits on Jun 20, 2017

Updated to lates Forge
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Commits on Jul 19, 2017

Updated Tests for Forge 1.12
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Commits on Aug 7, 2017

Update WorldRetrogen.java
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Commits on Aug 8, 2017

Update WorldRetrogen.java
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Commits on Oct 17, 2017

Updated to latest dev version
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