Version 3.0

* Added: Search post object for post redirect type
* Added: Redirect preview
* Added action: `redirector-update`
* Added action: `redirector-modal-search-begin`
* Added action: `redirector-modal-search-end`
* Added filter: `redirector-recent-posts`
* Added filter: `redirector-redirect-url`
* Added filter: `redirector-status-code`
* Added filter: `redirector-meta`
* Enhancement: New Redirector UI
* Removed Filter: `redirector_redirect`
* Removed Filter: `redirector_status`
* Removed Filter: `redirector_types`

Signed-off-by: Ralf Hortt <me@horttcore.de>