[CB-2308] Document loaderror event
CB-2677: Doc adding prompt to Notification API

-added new notification.prompt.md file with API and samples
-updated to include prompt in Notification API reference
[CB-2677] Whitespace cleanup and convert tabs to spaces.
[CB-2545] Deprecate iOS EnableLocation project setting
[CB-2735] - fixed up command line usage in the docs for blackberry
[CB-2609] wrote migration guide for 2.4.0 from 2.3.0
[CB-2610] migration guide for 2.3.0 from 2.2.0
[CB-2781] Create iOS Project Setting for KeyboardShrinksView
[CB-2305] Add documntation for InAppBrowser.executeScript and InAppBrowser.insertCSS APIs
[CB-2807] - close function is supported in InAppBrowser
Added iOS upgrading instructions from 2.5.0 to 2.6.0
[CB-2305] Document executeScript callback parameters