[repo] Update list of obsolete pages

Author: andrewnicols

data/obsoletePages.json

@@ -264,8 +264,11 @@
   "Moodle Mobile Building the app for Android",
   "Moodle Mobile Building the app for iOS",
   "Moodle Mobile Development Process",
+  "Moodle Mobile Push Notifications",
   "Moodle Mobile Testing with Phonegap Developer app",
+  "Moodle Mobile Themes Development",
   "Moodle Mobile custom apps",
+  "Moodle Mobile remote add-on tutorial",
   "Moodle User Interface Guidelines",
   "Moodle User Interface Guidelines:Help requested",
   "Moodle and PHP 7.0 details",