Implemented `Draw` for `BevelRectangleBorderColorContext`
Implemented `Draw` for `BevelRectangleBorderColorContext`

Closes https://github.com/PistonDevelopers/rust-graphics/issues/539

echochamber/graphics,mitchmindtree/graphics,stjahns/graphics,aepsil0n/graphics,PistonDevelopers/graphics,bvssvni/graphics,Vinatorul/graphics,andrewcsmith/graphics