Function addDirective

* looks up the directive and decorates it with exception handling and proper parameters. We * call this the boundDirective. * * @param {string} name name of the directive to look up. * @param {string} location The directive must be found in specific format. * String contai

(tDirectives, name, location, maxPriority, ignoreDirective, startAttrName,
                          endAttrName)