adding CHANGELOG for v3.7.0 release [skip-ci]
adding CHANGELOG for v3.7.0 release [skip-ci]

thecoolestguy/ilios,ilios/ilios,justinchu17/ilios,justinchu17/ilios,stopfstedt/ilios,Trott/ilios,ilios/ilios,dartajax/ilios,justinchu17/ilios,stopfstedt/ilios,thecoolestguy/ilios,justinchu17/ilios,Trott/ilios,dartajax/ilios