Added gitignore
Updated to VS 2012
Updated to .NET 4.5
Added new ConnectionResponse enum types to match protocol
Added new MqttConnackEventArgs with connection response
Added support for username and password
Applied proper formatting
Updated overloads to client factory
Merge branch 'master' of git://github.com/kfuglsang/MqttDotNet into kfuglsang-master
Added MonoDevelop .userprefs to git ignore list.