I have switched usages of Vector to ArrayList. #1

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Shrulik wants to merge 2 commits intoShamir-Lab:masterfrom Shrulik:master

+142-142

Commits on Dec 21, 2018

I have switched usages of Vector to ArrayList. Vector in Java is synchronized for thread safety, and is much slower. I also did some other code clean up where something jumped at me or my IDE.
Shrulik
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Commits on Jan 4, 2019

Missed a vector use
Shrulik
committed