support new sorting fixes. Fixes up a few other issues with the legacy ExamineBackedMedia class, it will now handle all data
stored in Examine. Simplifies the Examine internal index sets to include all data.
Updates Examine index configs to be simplified, don't need all of that config there!
Updates UmbracoExamine indexers to not initialize if the app/database is not ready.
Updates Examine event binders to not bind if the app/database is not ready.
Updates Examine events to use new 6.0+ events and removes binding entirely to the old api events (where we could)
