Added support for tag

src/loggly.tracker.js

@@ -16,6 +16,7 @@
     function LogglyTracker() {
         this.key = false;
 	this.sendConsoleErrors = false;
+	this.tag = 'jslogger'; 
     }
 
     function setKey(tracker, key) {
@@ -47,6 +48,10 @@
 		};
 	    }
 	}
+
+    function setTag(tracker, tag){
+    	tracker.tag = tag;
+    }	
 
     function setInputUrl(tracker) {
         tracker.inputUrl = LOGGLY_INPUT_PREFIX 
@@ -92,6 +97,10 @@
 		    if(data.sendConsoleErrors !== undefined) {
 		       	setSendConsoleError(self, data.sendConsoleErrors);
 		    }
+
+		    if(data.tag){
+		    	setTag(self, data.tag);
+		    }
 
                     if(data.logglyKey) {
                         setKey(self, data.logglyKey);