Implemented Buffer.close() and Buffer.fill().
Implemented Buffer.close() and Buffer.fill().

josiah-wolf-oberholtzer/supriya,Pulgama/supriya,andrewyoung1991/supriya,andrewyoung1991/supriya,Pulgama/supriya,Pulgama/supriya,andrewyoung1991/supriya,Pulgama/supriya