Version 3.1.0 Released

The biggest change in this release is the re-implementation of the search feature. (Also allowed auto-publishing via the import tool)

Changes:
FILES CHANGED:

* /layout/header.php (added search link)
* /image.php (changed bottom nav to direct back to search page if keywords are detected)
* /layout/style.php (added span.highlighttxt for search word highlighting)
* /admin/import/index.php (added ability to auto-publish imported images)

FILES ADDED:

* /search.php (the search page)
* /admin/lib/forms/searchform.php (search form)