Updated .gitignore with common Visual Studio settings
Updated .gitignore with common Visual Studio settings

Updated .gitignore with common Visual Studio settings from
https://github.com/github/gitignore/blob/master/VisualStudio.gitignore

nickheppleston/NLog.AzureStorage,nickheppleston/NLog.AzureStorage,nickheppleston/NLog.AzureStorage