WIP: it's gonna be done soon, not promising

Some fixes fixed like when making a salt and you have set your own
$char_world to someting like abc, you don't get three letter result even
if you have 100. Added possibility to make bigger then 120 character
strings. Worked pretty well if $length set to 2048. Made it in seconds
in my localhost aka Windows 7 with Intel Core i3 and 4 GB RAM. Added
mysqli object oriented style.