I was playing around with the driver and noticed when I print an ObjectID, an array of bytes is printed (ex: [90 150 78 63 112 202 150 82 152 208 62 199]).
As my first "contribution" I thought I would like to implement the Stringer interface for this type.
The string method will return a string with something like: ObjectId("5a964bd0939f8aaf8d729fc6").

I thought I would start with something simple to learn your contribution process.