Fixed Multiple console log issues 

In function writeFile changed console.log("Successful file read") to console.log("Successful file write")
diff --git a/README.md b/README.md
index 0e51f45..b2f1efb 100644
--- a/README.md
+++ b/README.md
@@ -632,12 +632,12 @@
     fileEntry.createWriter(function (fileWriter) {
 
         fileWriter.onwriteend = function() {
-            console.log("Successful file read...");
+            console.log("Successful file write...");
             readFile(fileEntry);
         };
 
         fileWriter.onerror = function (e) {
-            console.log("Failed file read: " + e.toString());
+            console.log("Failed file write: " + e.toString());
         };
 
         // If data object is not passed in,