Update the documentation to reflect that buffertools now extends the Buffer prototype.
Update the documentation to reflect that buffertools now extends the Buffer prototype.

chrisdew/node-buffertools,bnoordhuis/node-buffertools,chrisdew/node-buffertools,bnoordhuis/node-buffertools,chrisdew/node-buffertools,bnoordhuis/node-buffertools,chrisdew/node-buffertools,bnoordhuis/node-buffertools