Updated CHANGELOG for MR #904
Updated CHANGELOG for MR #904

mobxjs/mobx,mweststrate/MOBservable,mweststrate/MOBservable,andykog/mobservable,mobxjs/mobx,andykog/mobx,mweststrate/MOBservable,andykog/mobservable,mobxjs/mobx,andykog/mobx,mobxjs/mobx