Introduce CHANGELOG to keep track of changes (#1807)
Introduce CHANGELOG to keep track of changes (#1807)

Following the Keep a Changelog format, introduce a CHANGELOG to keep
track of changes to the project. No details added yet as the tagging is
inconsistent.

See: http://keepachangelog.com/en/1.0.0/
nireeshT/Hygieia,tabladrum/Hygieia,capitalone/Hygieia,pavan149679/Hygieia,tabladrum/Hygieia,tabladrum/Hygieia,nireeshT/Hygieia,capitalone/Hygieia,amitmawkin/Hygieia,capitalone/Hygieia,satishc1/Hygieia,jimzucker/Hygieia,amitmawkin/Hygieia,jimzucker/Hygieia,Sbrenthughes/Hygieia,amitmawkin/Hygieia,Sbrenthughes/Hygieia,satishc1/Hygieia,wolfspyre/Hygieia,pavan149679/Hygieia,jimzucker/Hygieia,jimzucker/Hygieia,pavan149679/Hygieia,nireeshT/Hygieia,Sbrenthughes/Hygieia,amitmawkin/Hygieia,wolfspyre/Hygieia,satishc1/Hygieia,Sbrenthughes/Hygieia,wolfspyre/Hygieia,tabladrum/Hygieia,nireeshT/Hygieia,capitalone/Hygieia,pavan149679/Hygieia,satishc1/Hygieia