Introducing 'frameless' keyword to [[Image:]] syntax which respects the user preferen...

Introducing 'frameless' keyword to [[Image:]] syntax which respects the user preferences for image width like 'thumb' but without a frame.
Now we can use frameless images without the need to nailing its size by a constant pixel parameter. Scaling by different user preference/anon view will always keep the proportions.

Usage: [[Image:name.jpg|frameless|right]]