Made hash and previousHash variables private and added the correspond…#3

Open

ericdsoto wants to merge 2 commits intoCryptoKass:masterfrom ericdsoto:master

+36-23

Commits on Feb 20, 2018

Made hash and previousHash variables private and added the corresponding getter methods. Improved general readability.
Eric D. Soto
committed

Commits on Apr 19, 2018

Changed StringBuffer to StringBuilder in method applySha256() of class StringUtil.
Eric D. Soto
committed