xF1 Add-on User Merge Search Update 1.1.1

• Search Improvements compatibility fix

Note; this add-on is not requires for XF2+

Support for upcoming User Essentials 2.7.0 release

• Provide infrastructure for other add-ons to call supress this add-on from doing anything, and then invoke the search update after they have done their work.

• Elastic Search v5 support
• Add option under rebuild caches page to kick of the deferred task.