Blackboard client dev

Added utility method for inserting an array of documents. 

Also added 'unsafe' methods that do not use the default SAFE WriteConcern. These methods adhere to the fire and forget philosophy of Mongo in that they do not wait for any confirmation from the server that the operation has been written to disk nor what the result was. These methods can be used in timing critical situations where confirmation is not required.

Additionally the OplogMonitorThread dies in a cleaner way, catching any stray exceptions that may be thrown by mongo during the interruption process.