Add more touch icons and description where it use

Add more touch icons and compress new and some old in https://tinypng.com/
For information was used famous article about touch icons https://mathiasbynens.be/notes/touch-icons
@frontenddeveloping  In practice, iPhone 6 and 6 Plus don't use the `180×180 icon`,  see: https://github.com/h5bp/html5-boilerplate/pull/1599.