Handle image loads by adding a load listener
Format
refactor
Merge branch 'imageload' of https://github.com/ynh/iframe-resizer into ynh-imageload

Conflicts:
	js/iframeResizer.contentWindow.min.js
	js/iframeResizer.min.js
	src/iframeResizer.contentWindow.map
Merge branch 'ynh-imageload'
Refactor imageLoad contributed code.