Added simple body class.

Signed off by Renato Lui Geh <renatogeh@gmail.com>
Body has a drawing primitive, but draws nothing for now.

Signed off by: Renato Lui Geh <renatogeh@gmail.com>
Body is draw at origin as a white quad

Signed off by: Renato Lui Geh <renatogeh@gmail.com:
Body is drawn at its proper position.

Signed off by: Renato Lui Geh <renatogeh@gmail.com>
Merge branch 'body' into dev

Signed off by: Renato Lui Geh <renatogeh@gmail.com>