1) Adds support for keeping track of all WS calls made by the app and maintaining a log that can eventually be displayed to the user
1) removes the customized name of each public method on the service classes which cause the WS to  be invoked (promoted and generalized to the super class)
1) adds "executeServiceCall" to the parent "QuickIntlCourierBaseService" class; 2) other refactorings to the enum of WSCallTypes; 3) externalizes the URLs for the WS Calls outside of the "QuickIntlCourierBaseService" class