Update Stack Overflow for Stack Exchange
Added meta tag to sites for use on stack exchange, et al
Add link to delete Coderwall account.

Also switch the complexity to easy, even though I couldn't see that link
anywhere on the site.

Thanks @txus for the Catalan and Castilian translations!
Small typo
Corrected german sentences
Added my name to the list of translation contributors
zh-cn translation
Add id lang
Added message for webf1 students as a joke
Static
Hide message after 3 seconds
Adding Zootool
Update sites.json

Added: McAfee
Merge branch 'coderwall_link' of github.com:gregkare/justdelete.me into gregkare-coderwall_link
Merge branch 'master' of github.com:ffflorian/justdelete.me into ffflorian-master
Merge branch 'master' of github.com:Jonwei/justdelete.me into Jonwei-master
Added flags and chinese to dropdowns, static
Fix merge conflicts
Added indonesia flags, contributor stuff
Merge branch 'master' of github.com:nkcmr/justdelete.me into nkcmr-master