3.10.0: Retryable I/O

• Merged PR #68: Retry reads and writes when protocol errors occur. See
  https://www.mongodb.com/docs/manual/core/retryable-reads/ and
  https://www.mongodb.com/docs/manual/core/retryable-writes/
  (@thekid)
• Made it possible to run commands like replSetReconfig via run() in
  both com.mongodb.MongoConnection and com.mongodb.Collection classes
  (@thekid)
• Fixed com.mongodb.Error::newInstance() when receiving errors without
  code and codeName fields
  (@thekid)
• Fixed Undefined variable $params when running MongoConnection::run()
  (@thekid)
• Merged PR #67: Add packet out-of-order detection, preventing inconsistent
  protocol state from causing confusing errors on subsequent requests.
  Closes the corresponding connection.
  (@thekid)