Adds a Post Deployment Actions Dir constant for use with AppSettings
Adds an extension method to get the Post Deployment Actions dir from the appsettings where a default path is passed in, which will be used if no app setting is set.
Modifies the private PostDeploymentActionsDir method to get the path to the Post Deployment Actions from AppSettings or default to the standard path if nothing is explicitly set in web.config.
Prefixing Post Deployment Action constant with SCM
Updating the DIR part to PATH for consistency