roll exists check into feed and dashboard creation

Author: toddtreece

src/AdafruitIO_Dashboard.cpp

@@ -39,6 +39,9 @@ bool AdafruitIO_Dashboard::exists()
 
 bool AdafruitIO_Dashboard::create()
 {
+  if(exists())
+    return true;
+
   String url = "/api/v2/";
   url += _io->_username;
   url += "/dashboards";

src/AdafruitIO_Feed.cpp

@@ -126,6 +126,9 @@ bool AdafruitIO_Feed::exists()
 
 bool AdafruitIO_Feed::create()
 {
+  if(exists())
+    return true;
+
   String body = "name=";
   body += name;