* Adding Backup Recovery Codes (Recovery) as a method.
Thanks to Spitfireap for work, and peterthomassen for guidance.
* Added: `RECOVERY_ITERATION` to set the number of iteration when hashing recovery token
* Added: `MFA_ENFORCE_RECOVERY_METHOD` to enforce the user to enroll in the recovery code method once, they add any other method,
* Added: `MFA_ALWAYS_GO_TO_LAST_METHOD` to the settings which redirects the user automatically to the last used method when logging in
* Added: `MFA_RENAME_METHODS` to be able to rename the methods for the user.
* Fix: Alot of CSS fixes for the example application