Find max ops/sec that can be pushed through go-couchbase.

Write 'doc1' through 'doc100000', and then spawn readers to get chunks of that set.

• Ability to swap out go-couchbase and gocb
• Ability to tune how many concurrent goroutines are using the client
• Ability to tune connection pool size (in the case of go-couchbase)
• Ability to tune the doc size and total number of docs