Changed server bind logging to list bind counts and limit.
removed logging when getNextBindingForDelivery returns None
Added ability to remove an SMPP connection from the server
Reduced logging when handling an SMPP error
Added a way to get count of bound connections
Merge branch
Improved get bound connections to not error when system_id is not bound
Connection now dropped if no data received during inactivity timer
Merge pull request #8 from rtrdev/master

Server improvements