Player model: Remove vertical stretch of body and limbs, remove cape

Player model: Remove vertical stretch of body and limbs, remove cape

Previously, body and limbs were stretched vertically by 1.125, creating
rectangular pixels on side faces. Head was unstretched.
Remove stretch of body and limbs, leaving the head unchanged.
No other change would excessively shorten the model, so also scale up
the model slightly, by * 1.05, such that the reduction factor for height is
equal to the increasing factor for width. This minimises the changes to
height and width.

Remove cape support.

Update the collisionbox to match.

Add missing license.txt.