XT60 cap easy fitting

I designed this XT60 cap, for an easy fitting thanks to a large dimensional tolerance.

Added models renforced with 1.5mm and 1mm thikness

Added new versions labeled with big letters "F", "E" and "S", because the text dimentions I used for label the caps (full, empty and storage) is a little small, and in base of the nozze dimentions, they can results unreadable.