Merge branch 'master' into master

src/loggly.tracker.js

@@ -187,9 +187,13 @@
                 //creating an asynchronous XMLHttpRequest
                 var xmlHttp = new XMLHttpRequest();
                 xmlHttp.open('POST', this.inputUrl, true); //true for asynchronous request
-                xmlHttp.setRequestHeader('Content-Type', 'text/plain');
-                xmlHttp.send(toStringValue(data));
 
+                if (tracker.useUtfEncoding === true) {
+                    xmlHttp.setRequestHeader('Content-Type', 'text/plain; charset=utf-8');
+                } else {
+                    xmlHttp.setRequestHeader('Content-Type', 'text/plain');
+                }
+                xmlHttp.send(JSON.stringify(data));
             } catch (ex) {
                 if (window && window.console && typeof window.console.log === 'function') {
                     console.log("Failed to log to loggly because of this exception:\n" + ex);