remove index.php
new features (lock, swap, auto etc)

ability to lock, swap letters by typing over them, auto-place
letters(auto button), unused letters are strikethrough, highlighting in
workingarea, classes for colours in table, back colours swapped around
Revert "remove index.php"

This reverts commit ebbdabeb69a7de950e01035b02a1f7d9d5fd6a85.
Merge https://github.com/whyando/Ultimate-Cipher-Tool