Auto generate password

[olback]

If the user leaves the 'Password' field when clicking upload, generate a password automatically.

• Added one quotation mark so that syntax highlighting works. (index.php)
• Don't include encrypt.js and aes.js twice. (index.php)
• "required" is no longer needed for the password input.

[Carlgo11]

I TURNED MYSELF INTO A COMMIT MORTY. I'M GIT RIIIIICK!