updated checkbox sample image with comparison
updated checkbox sample image with comparison

jdewit/ez-checkbox,jdewit/ez-checkbox,lowesoftware/mobileangularui-checkbox,thebigh2014/angular-bootstrap-radio,avantgarde-labs/angular-bootstrap-checkbox,sebastianha/angular-bootstrap-checkbox,hitchcockwill/angular-bootstrap-checkbox,sebastianha/angular-bootstrap-checkbox,HourlyNerd/angular-bootstrap-checkbox,hitchcockwill/angular-bootstrap-checkbox,HichemBenChaaben/angular-bootstrap-checkbox,avantgarde-labs/angular-bootstrap-checkbox,HichemBenChaaben/angular-bootstrap-checkbox,HourlyNerd/angular-bootstrap-checkbox