Merge pull request #1076 from Ramoonus/2.x

Init Dutch Language
Add View link to ACT publish metabox; Include post_format and nav_menu in list of taxonomies you can extend; Exclude all existing objects already extended by Pods on Add New Pod > Extend screen
Fix attributes handling for non-label/etc types; Abstract suggable_single usage better
Manage Fields tab fix for Taxonomies with extra fields disabled
New Pods::nth matching enhances zebra() checker, allows for if ( $pod->nth( 'even' ) ) and others (see nth-child CSS selector for supported options) when in $pod->fetch loop
Tweak to var usage in nth()
Pods 2.3 Alpha 11 - Fixes #1082; Split the Advanced Content Type option into it's own component (when activated, option shows on Add New Pod screen); Added User Role limiting for User Relationship fields; Added User Role visibility option; Added support in field options form for multi-select checkbox inputs; Abstract table handling for relationship queries a bit more; Run update.php only if PODS_DB_VERSION is less than current version; Better handling of traversal on core tables that aren't Pods
Fixes #1085
Fixes #1054; Added ->field( 'avatar' ) for users, uses get_avatar #971; Set all Pods necessary options as autoload; Fixes Avatar handling / loading; Fixes #1049; Fix issue when renaming extended Pod, better enforcing the inability to rename on post types / taxonomies
Pods 2.3 Alpha 14 - Improve caching and update autoload options again
Fixes #659
Tweak to get all meta
Fix load_pods transient bug
Tweak autoload options
Tweak to load_pods cache handler
Fixes #1088; Added PodsAPI::duplicate_pod; Added Pods::import; Added duplicate pod option to Edit Pods screen; PodsUI tweaks
CSS Fixes for #1089
Update Select2 to 3.3.1
Fixes #1091; Fixes #1090
Adding developer_mode to field options handler; Added repeatable option to field types for #1095