* Introduces a verification code step before generating password reset links.
* New configuration "password_reset_code_duration".
* Adds Base32, TOTP and PHPQRCode classes .
* New section is required in password.tpl: code verification won't work on themes not updated yet.
* 5 new language strings were added.
create new theme standard pages with tpl, css, js and images
update backend to handle pages
add config use_standard_pages
on update set config to false, on install set config to true
add standard pages to no be ingored in git
