Added 'uint64_t' for correct compile on VS2013.
Extended an example for better understand the Couchbase. Added a correct JSON for key "Foo". Instead of "Warning: Editing of binary document is not allowed", we can see by http://localhost:8091 that document:
{
  "v": 100.1,
  "list": [
    1,
    2,
    3,
    4,
    5,
    6,
    7
  ],
  "talk": "About Foo."
}
Merge pull request #2 from signmotion/extend-example

Extended an example: added a correct JSON document.